$

node_modules/are-we-there-yet/LICENSE.md

@@ -0,0 +1,18 @@
+ISC License
+
+Copyright npm, Inc.
+
+Permission to use, copy, modify, and/or distribute this
+software for any purpose with or without fee is hereby
+granted, provided that the above copyright notice and this
+permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND NPM DISCLAIMS ALL
+WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
+EVENT SHALL NPM BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
+USE OR PERFORMANCE OF THIS SOFTWARE.

node_modules/are-we-there-yet/README.md

@@ -0,0 +1,208 @@
+are-we-there-yet
+----------------
+
+Track complex hierarchies of asynchronous task completion statuses.  This is
+intended to give you a way of recording and reporting the progress of the big
+recursive fan-out and gather type workflows that are so common in async.
+
+What you do with this completion data is up to you, but the most common use case is to
+feed it to one of the many progress bar modules.
+
+Most progress bar modules include a rudimentary version of this, but my
+needs were more complex.
+
+Usage
+=====
+
+```javascript
+var TrackerGroup = require("are-we-there-yet").TrackerGroup
+
+var top = new TrackerGroup("program")
+
+var single = top.newItem("one thing", 100)
+single.completeWork(20)
+
+console.log(top.completed()) // 0.2
+
+fs.stat("file", function(er, stat) {
+  if (er) throw er  
+  var stream = top.newStream("file", stat.size)
+  console.log(top.completed()) // now 0.1 as single is 50% of the job and is 20% complete
+                              // and 50% * 20% == 10%
+  fs.createReadStream("file").pipe(stream).on("data", function (chunk) {
+    // do stuff with chunk
+  })
+  top.on("change", function (name) {
+    // called each time a chunk is read from "file"
+    // top.completed() will start at 0.1 and fill up to 0.6 as the file is read
+  })
+})
+```
+
+Shared Methods
+==============
+
+* var completed = tracker.completed()
+
+Implemented in: `Tracker`, `TrackerGroup`, `TrackerStream`
+
+Returns the ratio of completed work to work to be done. Range of 0 to 1.
+
+* tracker.finish()
+
+Implemented in: `Tracker`, `TrackerGroup`
+
+Marks the tracker as completed. With a TrackerGroup this marks all of its
+components as completed.
+
+Marks all of the components of this tracker as finished, which in turn means
+that `tracker.completed()` for this will now be 1.
+
+This will result in one or more `change` events being emitted.
+
+Events
+======
+
+All tracker objects emit `change` events with the following arguments:
+
+```
+function (name, completed, tracker)
+```
+
+`name` is the name of the tracker that originally emitted the event,
+or if it didn't have one, the first containing tracker group that had one.
+
+`completed` is the percent complete (as returned by `tracker.completed()` method).
+
+`tracker` is the tracker object that you are listening for events on.
+
+TrackerGroup
+============
+
+* var tracker = new TrackerGroup(**name**)
+
+  * **name** *(optional)* - The name of this tracker group, used in change
+    notifications if the component updating didn't have a name. Defaults to undefined.
+
+Creates a new empty tracker aggregation group. These are trackers whose
+completion status is determined by the completion status of other trackers added to this aggregation group.
+
+Ex.
+
+```javascript
+var tracker = new TrackerGroup("parent")
+var foo = tracker.newItem("firstChild", 100)
+var bar = tracker.newItem("secondChild", 100)
+
+foo.finish()
+console.log(tracker.completed()) // 0.5
+bar.finish()
+console.log(tracker.completed()) // 1
+```
+
+* tracker.addUnit(**otherTracker**, **weight**)
+
+  * **otherTracker** - Any of the other are-we-there-yet tracker objects
+  * **weight** *(optional)* - The weight to give the tracker, defaults to 1.
+
+Adds the **otherTracker** to this aggregation group. The weight determines
+how long you expect this tracker to take to complete in proportion to other
+units.  So for instance, if you add one tracker with a weight of 1 and
+another with a weight of 2, you're saying the second will take twice as long
+to complete as the first.  As such, the first will account for 33% of the
+completion of this tracker and the second will account for the other 67%.
+
+Returns **otherTracker**.
+
+* var subGroup = tracker.newGroup(**name**, **weight**)
+
+The above is exactly equivalent to:
+
+```javascript
+  var subGroup = tracker.addUnit(new TrackerGroup(name), weight)
+```
+
+* var subItem = tracker.newItem(**name**, **todo**, **weight**)
+
+The above is exactly equivalent to:
+
+```javascript
+  var subItem = tracker.addUnit(new Tracker(name, todo), weight)
+```
+
+* var subStream = tracker.newStream(**name**, **todo**, **weight**)
+
+The above is exactly equivalent to:
+
+```javascript
+  var subStream = tracker.addUnit(new TrackerStream(name, todo), weight)
+```
+
+* console.log( tracker.debug() )
+
+Returns a tree showing the completion of this tracker group and all of its
+children, including recursively entering all of the children.
+
+Tracker
+=======
+
+* var tracker = new Tracker(**name**, **todo**)
+
+  * **name** *(optional)* The name of this counter to report in change
+    events.  Defaults to undefined.
+  * **todo** *(optional)* The amount of work todo (a number). Defaults to 0.
+
+Ordinarily these are constructed as a part of a tracker group (via
+`newItem`).
+
+* var completed = tracker.completed()
+
+Returns the ratio of completed work to work to be done. Range of 0 to 1. If
+total work to be done is 0 then it will return 0.
+
+* tracker.addWork(**todo**)
+
+  * **todo** A number to add to the amount of work to be done.
+
+Increases the amount of work to be done, thus decreasing the completion
+percentage.  Triggers a `change` event.
+
+* tracker.completeWork(**completed**)
+
+  * **completed** A number to add to the work complete
+
+Increase the amount of work complete, thus increasing the completion percentage.
+Will never increase the work completed past the amount of work todo. That is,
+percentages > 100% are not allowed. Triggers a `change` event.
+
+* tracker.finish()
+
+Marks this tracker as finished, tracker.completed() will now be 1. Triggers
+a `change` event.
+
+TrackerStream
+=============
+
+* var tracker = new TrackerStream(**name**, **size**, **options**)
+
+  * **name** *(optional)* The name of this counter to report in change
+    events.  Defaults to undefined.
+  * **size** *(optional)* The number of bytes being sent through this stream.
+  * **options** *(optional)* A hash of stream options
+
+The tracker stream object is a pass through stream that updates an internal
+tracker object each time a block passes through.  It's intended to track
+downloads, file extraction and other related activities. You use it by piping
+your data source into it and then using it as your data source.
+
+If your data has a length attribute then that's used as the amount of work
+completed when the chunk is passed through.  If it does not (eg, object
+streams) then each chunk counts as completing 1 unit of work, so your size
+should be the total number of objects being streamed.
+
+* tracker.addWork(**todo**)
+
+  * **todo** Increase the expected overall size by **todo** bytes.
+
+Increases the amount of work to be done, thus decreasing the completion
+percentage.  Triggers a `change` event.

node_modules/are-we-there-yet/lib/index.js

@@ -0,0 +1,4 @@
+'use strict'
+exports.TrackerGroup = require('./tracker-group.js')
+exports.Tracker = require('./tracker.js')
+exports.TrackerStream = require('./tracker-stream.js')

node_modules/are-we-there-yet/lib/tracker-base.js

@@ -0,0 +1,11 @@
+'use strict'
+var EventEmitter = require('events').EventEmitter
+var util = require('util')
+
+var trackerId = 0
+var TrackerBase = module.exports = function (name) {
+  EventEmitter.call(this)
+  this.id = ++trackerId
+  this.name = name
+}
+util.inherits(TrackerBase, EventEmitter)

node_modules/are-we-there-yet/lib/tracker-group.js

@@ -0,0 +1,116 @@
+'use strict'
+var util = require('util')
+var TrackerBase = require('./tracker-base.js')
+var Tracker = require('./tracker.js')
+var TrackerStream = require('./tracker-stream.js')
+
+var TrackerGroup = module.exports = function (name) {
+  TrackerBase.call(this, name)
+  this.parentGroup = null
+  this.trackers = []
+  this.completion = {}
+  this.weight = {}
+  this.totalWeight = 0
+  this.finished = false
+  this.bubbleChange = bubbleChange(this)
+}
+util.inherits(TrackerGroup, TrackerBase)
+
+function bubbleChange (trackerGroup) {
+  return function (name, completed, tracker) {
+    trackerGroup.completion[tracker.id] = completed
+    if (trackerGroup.finished) {
+      return
+    }
+    trackerGroup.emit('change', name || trackerGroup.name, trackerGroup.completed(), trackerGroup)
+  }
+}
+
+TrackerGroup.prototype.nameInTree = function () {
+  var names = []
+  var from = this
+  while (from) {
+    names.unshift(from.name)
+    from = from.parentGroup
+  }
+  return names.join('/')
+}
+
+TrackerGroup.prototype.addUnit = function (unit, weight) {
+  if (unit.addUnit) {
+    var toTest = this
+    while (toTest) {
+      if (unit === toTest) {
+        throw new Error(
+          'Attempted to add tracker group ' +
+          unit.name + ' to tree that already includes it ' +
+          this.nameInTree(this))
+      }
+      toTest = toTest.parentGroup
+    }
+    unit.parentGroup = this
+  }
+  this.weight[unit.id] = weight || 1
+  this.totalWeight += this.weight[unit.id]
+  this.trackers.push(unit)
+  this.completion[unit.id] = unit.completed()
+  unit.on('change', this.bubbleChange)
+  if (!this.finished) {
+    this.emit('change', unit.name, this.completion[unit.id], unit)
+  }
+  return unit
+}
+
+TrackerGroup.prototype.completed = function () {
+  if (this.trackers.length === 0) {
+    return 0
+  }
+  var valPerWeight = 1 / this.totalWeight
+  var completed = 0
+  for (var ii = 0; ii < this.trackers.length; ii++) {
+    var trackerId = this.trackers[ii].id
+    completed +=
+      valPerWeight * this.weight[trackerId] * this.completion[trackerId]
+  }
+  return completed
+}
+
+TrackerGroup.prototype.newGroup = function (name, weight) {
+  return this.addUnit(new TrackerGroup(name), weight)
+}
+
+TrackerGroup.prototype.newItem = function (name, todo, weight) {
+  return this.addUnit(new Tracker(name, todo), weight)
+}
+
+TrackerGroup.prototype.newStream = function (name, todo, weight) {
+  return this.addUnit(new TrackerStream(name, todo), weight)
+}
+
+TrackerGroup.prototype.finish = function () {
+  this.finished = true
+  if (!this.trackers.length) {
+    this.addUnit(new Tracker(), 1, true)
+  }
+  for (var ii = 0; ii < this.trackers.length; ii++) {
+    var tracker = this.trackers[ii]
+    tracker.finish()
+    tracker.removeListener('change', this.bubbleChange)
+  }
+  this.emit('change', this.name, 1, this)
+}
+
+var buffer = '                                  '
+TrackerGroup.prototype.debug = function (depth) {
+  depth = depth || 0
+  var indent = depth ? buffer.slice(0, depth) : ''
+  var output = indent + (this.name || 'top') + ': ' + this.completed() + '\n'
+  this.trackers.forEach(function (tracker) {
+    if (tracker instanceof TrackerGroup) {
+      output += tracker.debug(depth + 1)
+    } else {
+      output += indent + ' ' + tracker.name + ': ' + tracker.completed() + '\n'
+    }
+  })
+  return output
+}

node_modules/are-we-there-yet/lib/tracker-stream.js

@@ -0,0 +1,36 @@
+'use strict'
+var util = require('util')
+var stream = require('readable-stream')
+var delegate = require('delegates')
+var Tracker = require('./tracker.js')
+
+var TrackerStream = module.exports = function (name, size, options) {
+  stream.Transform.call(this, options)
+  this.tracker = new Tracker(name, size)
+  this.name = name
+  this.id = this.tracker.id
+  this.tracker.on('change', delegateChange(this))
+}
+util.inherits(TrackerStream, stream.Transform)
+
+function delegateChange (trackerStream) {
+  return function (name, completion, tracker) {
+    trackerStream.emit('change', name, completion, trackerStream)
+  }
+}
+
+TrackerStream.prototype._transform = function (data, encoding, cb) {
+  this.tracker.completeWork(data.length ? data.length : 1)
+  this.push(data)
+  cb()
+}
+
+TrackerStream.prototype._flush = function (cb) {
+  this.tracker.finish()
+  cb()
+}
+
+delegate(TrackerStream.prototype, 'tracker')
+  .method('completed')
+  .method('addWork')
+  .method('finish')

node_modules/are-we-there-yet/lib/tracker.js

@@ -0,0 +1,32 @@
+'use strict'
+var util = require('util')
+var TrackerBase = require('./tracker-base.js')
+
+var Tracker = module.exports = function (name, todo) {
+  TrackerBase.call(this, name)
+  this.workDone = 0
+  this.workTodo = todo || 0
+}
+util.inherits(Tracker, TrackerBase)
+
+Tracker.prototype.completed = function () {
+  return this.workTodo === 0 ? 0 : this.workDone / this.workTodo
+}
+
+Tracker.prototype.addWork = function (work) {
+  this.workTodo += work
+  this.emit('change', this.name, this.completed(), this)
+}
+
+Tracker.prototype.completeWork = function (work) {
+  this.workDone += work
+  if (this.workDone > this.workTodo) {
+    this.workDone = this.workTodo
+  }
+  this.emit('change', this.name, this.completed(), this)
+}
+
+Tracker.prototype.finish = function () {
+  this.workTodo = this.workDone = 1
+  this.emit('change', this.name, 1, this)
+}

node_modules/are-we-there-yet/node_modules/readable-stream/CONTRIBUTING.md

@@ -0,0 +1,38 @@
+# Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+* (a) The contribution was created in whole or in part by me and I
+  have the right to submit it under the open source license
+  indicated in the file; or
+
+* (b) The contribution is based upon previous work that, to the best
+  of my knowledge, is covered under an appropriate open source
+  license and I have the right under that license to submit that
+  work with modifications, whether created in whole or in part
+  by me, under the same open source license (unless I am
+  permitted to submit under a different license), as indicated
+  in the file; or
+
+* (c) The contribution was provided directly to me by some other
+  person who certified (a), (b) or (c) and I have not modified
+  it.
+
+* (d) I understand and agree that this project and the contribution
+  are public and that a record of the contribution (including all
+  personal information I submit with it, including my sign-off) is
+  maintained indefinitely and may be redistributed consistent with
+  this project or the open source license(s) involved.
+
+## Moderation Policy
+
+The [Node.js Moderation Policy] applies to this WG.
+
+## Code of Conduct
+
+The [Node.js Code of Conduct][] applies to this WG.
+
+[Node.js Code of Conduct]:
+https://github.com/nodejs/node/blob/master/CODE_OF_CONDUCT.md
+[Node.js Moderation Policy]:
+https://github.com/nodejs/TSC/blob/master/Moderation-Policy.md

node_modules/are-we-there-yet/node_modules/readable-stream/GOVERNANCE.md

@@ -0,0 +1,136 @@
+### Streams Working Group
+
+The Node.js Streams is jointly governed by a Working Group
+(WG)
+that is responsible for high-level guidance of the project.
+
+The WG has final authority over this project including:
+
+* Technical direction
+* Project governance and process (including this policy)
+* Contribution policy
+* GitHub repository hosting
+* Conduct guidelines
+* Maintaining the list of additional Collaborators
+
+For the current list of WG members, see the project
+[README.md](./README.md#current-project-team-members).
+
+### Collaborators
+
+The readable-stream GitHub repository is
+maintained by the WG and additional Collaborators who are added by the
+WG on an ongoing basis.
+
+Individuals making significant and valuable contributions are made
+Collaborators and given commit-access to the project. These
+individuals are identified by the WG and their addition as
+Collaborators is discussed during the WG meeting.
+
+_Note:_ If you make a significant contribution and are not considered
+for commit-access log an issue or contact a WG member directly and it
+will be brought up in the next WG meeting.
+
+Modifications of the contents of the readable-stream repository are
+made on
+a collaborative basis. Anybody with a GitHub account may propose a
+modification via pull request and it will be considered by the project
+Collaborators. All pull requests must be reviewed and accepted by a
+Collaborator with sufficient expertise who is able to take full
+responsibility for the change. In the case of pull requests proposed
+by an existing Collaborator, an additional Collaborator is required
+for sign-off. Consensus should be sought if additional Collaborators
+participate and there is disagreement around a particular
+modification. See _Consensus Seeking Process_ below for further detail
+on the consensus model used for governance.
+
+Collaborators may opt to elevate significant or controversial
+modifications, or modifications that have not found consensus to the
+WG for discussion by assigning the ***WG-agenda*** tag to a pull
+request or issue. The WG should serve as the final arbiter where
+required.
+
+For the current list of Collaborators, see the project
+[README.md](./README.md#members).
+
+### WG Membership
+
+WG seats are not time-limited.  There is no fixed size of the WG.
+However, the expected target is between 6 and 12, to ensure adequate
+coverage of important areas of expertise, balanced with the ability to
+make decisions efficiently.
+
+There is no specific set of requirements or qualifications for WG
+membership beyond these rules.
+
+The WG may add additional members to the WG by unanimous consensus.
+
+A WG member may be removed from the WG by voluntary resignation, or by
+unanimous consensus of all other WG members.
+
+Changes to WG membership should be posted in the agenda, and may be
+suggested as any other agenda item (see "WG Meetings" below).
+
+If an addition or removal is proposed during a meeting, and the full
+WG is not in attendance to participate, then the addition or removal
+is added to the agenda for the subsequent meeting.  This is to ensure
+that all members are given the opportunity to participate in all
+membership decisions.  If a WG member is unable to attend a meeting
+where a planned membership decision is being made, then their consent
+is assumed.
+
+No more than 1/3 of the WG members may be affiliated with the same
+employer.  If removal or resignation of a WG member, or a change of
+employment by a WG member, creates a situation where more than 1/3 of
+the WG membership shares an employer, then the situation must be
+immediately remedied by the resignation or removal of one or more WG
+members affiliated with the over-represented employer(s).
+
+### WG Meetings
+
+The WG meets occasionally on a Google Hangout On Air. A designated moderator
+approved by the WG runs the meeting. Each meeting should be
+published to YouTube.
+
+Items are added to the WG agenda that are considered contentious or
+are modifications of governance, contribution policy, WG membership,
+or release process.
+
+The intention of the agenda is not to approve or review all patches;
+that should happen continuously on GitHub and be handled by the larger
+group of Collaborators.
+
+Any community member or contributor can ask that something be added to
+the next meeting's agenda by logging a GitHub Issue. Any Collaborator,
+WG member or the moderator can add the item to the agenda by adding
+the ***WG-agenda*** tag to the issue.
+
+Prior to each WG meeting the moderator will share the Agenda with
+members of the WG. WG members can add any items they like to the
+agenda at the beginning of each meeting. The moderator and the WG
+cannot veto or remove items.
+
+The WG may invite persons or representatives from certain projects to
+participate in a non-voting capacity.
+
+The moderator is responsible for summarizing the discussion of each
+agenda item and sends it as a pull request after the meeting.
+
+### Consensus Seeking Process
+
+The WG follows a
+[Consensus
+Seeking](http://en.wikipedia.org/wiki/Consensus-seeking_decision-making)
+decision-making model.
+
+When an agenda item has appeared to reach a consensus the moderator
+will ask "Does anyone object?" as a final call for dissent from the
+consensus.
+
+If an agenda item cannot reach a consensus a WG member can call for
+either a closing vote or a vote to table the issue to the next
+meeting. The call for a vote must be seconded by a majority of the WG
+or else the discussion will continue. Simple majority wins.
+
+Note that changes to WG membership require a majority consensus.  See
+"WG Membership" above.

node_modules/are-we-there-yet/node_modules/readable-stream/LICENSE

@@ -0,0 +1,47 @@
+Node.js is licensed for use as follows:
+
+"""
+Copyright Node.js contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
+
+This license applies to parts of Node.js originating from the
+https://github.com/joyent/node repository:
+
+"""
+Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""

node_modules/are-we-there-yet/node_modules/readable-stream/README.md

@@ -0,0 +1,106 @@
+# readable-stream
+
+***Node.js core streams for userland*** [![Build Status](https://travis-ci.com/nodejs/readable-stream.svg?branch=master)](https://travis-ci.com/nodejs/readable-stream)
+
+
+[![NPM](https://nodei.co/npm/readable-stream.png?downloads=true&downloadRank=true)](https://nodei.co/npm/readable-stream/)
+[![NPM](https://nodei.co/npm-dl/readable-stream.png?&months=6&height=3)](https://nodei.co/npm/readable-stream/)
+
+
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/readabe-stream.svg)](https://saucelabs.com/u/readabe-stream)
+
+```bash
+npm install --save readable-stream
+```
+
+This package is a mirror of the streams implementations in Node.js.
+
+Full documentation may be found on the [Node.js website](https://nodejs.org/dist/v10.18.1/docs/api/stream.html).
+
+If you want to guarantee a stable streams base, regardless of what version of
+Node you, or the users of your libraries are using, use **readable-stream** *only* and avoid the *"stream"* module in Node-core, for background see [this blogpost](http://r.va.gg/2014/06/why-i-dont-use-nodes-core-stream-module.html).
+
+As of version 2.0.0 **readable-stream** uses semantic versioning.
+
+## Version 3.x.x
+
+v3.x.x of `readable-stream` is a cut from Node 10. This version supports Node 6, 8, and 10, as well as evergreen browsers, IE 11 and latest Safari. The breaking changes introduced by v3 are composed by the combined breaking changes in [Node v9](https://nodejs.org/en/blog/release/v9.0.0/) and [Node v10](https://nodejs.org/en/blog/release/v10.0.0/), as follows:
+
+1. Error codes: https://github.com/nodejs/node/pull/13310,
+   https://github.com/nodejs/node/pull/13291,
+   https://github.com/nodejs/node/pull/16589,
+   https://github.com/nodejs/node/pull/15042,
+   https://github.com/nodejs/node/pull/15665,
+   https://github.com/nodejs/readable-stream/pull/344
+2. 'readable' have precedence over flowing
+   https://github.com/nodejs/node/pull/18994
+3. make virtual methods errors consistent
+   https://github.com/nodejs/node/pull/18813
+4. updated streams error handling
+   https://github.com/nodejs/node/pull/18438
+5. writable.end should return this.
+   https://github.com/nodejs/node/pull/18780
+6. readable continues to read when push('')
+   https://github.com/nodejs/node/pull/18211
+7. add custom inspect to BufferList
+   https://github.com/nodejs/node/pull/17907
+8. always defer 'readable' with nextTick
+   https://github.com/nodejs/node/pull/17979
+
+## Version 2.x.x
+v2.x.x of `readable-stream` is a cut of the stream module from Node 8 (there have been no semver-major changes from Node 4 to 8). This version supports all Node.js versions from 0.8, as well as evergreen browsers and IE 10 & 11.
+
+### Big Thanks
+
+Cross-browser Testing Platform and Open Source <3 Provided by [Sauce Labs][sauce]
+
+# Usage
+
+You can swap your `require('stream')` with `require('readable-stream')`
+without any changes, if you are just using one of the main classes and
+functions.
+
+```js
+const {
+  Readable,
+  Writable,
+  Transform,
+  Duplex,
+  pipeline,
+  finished
+} = require('readable-stream')
+````
+
+Note that `require('stream')` will return `Stream`, while
+`require('readable-stream')` will return `Readable`. We discourage using
+whatever is exported directly, but rather use one of the properties as
+shown in the example above.
+
+# Streams Working Group
+
+`readable-stream` is maintained by the Streams Working Group, which
+oversees the development and maintenance of the Streams API within
+Node.js. The responsibilities of the Streams Working Group include:
+
+* Addressing stream issues on the Node.js issue tracker.
+* Authoring and editing stream documentation within the Node.js project.
+* Reviewing changes to stream subclasses within the Node.js project.
+* Redirecting changes to streams from the Node.js project to this
+  project.
+* Assisting in the implementation of stream providers within Node.js.
+* Recommending versions of `readable-stream` to be included in Node.js.
+* Messaging about the future of streams to give the community advance
+  notice of changes.
+
+<a name="members"></a>
+## Team Members
+
+* **Calvin Metcalf** ([@calvinmetcalf](https://github.com/calvinmetcalf)) &lt;calvin.metcalf@gmail.com&gt;
+  - Release GPG key: F3EF5F62A87FC27A22E643F714CE4FF5015AA242
+* **Mathias Buus** ([@mafintosh](https://github.com/mafintosh)) &lt;mathiasbuus@gmail.com&gt;
+* **Matteo Collina** ([@mcollina](https://github.com/mcollina)) &lt;matteo.collina@gmail.com&gt;
+  - Release GPG key: 3ABC01543F22DD2239285CDD818674489FBC127E
+* **Irina Shestak** ([@lrlna](https://github.com/lrlna)) &lt;shestak.irina@gmail.com&gt;
+* **Yoshua Wyuts** ([@yoshuawuyts](https://github.com/yoshuawuyts)) &lt;yoshuawuyts@gmail.com&gt;
+
+[sauce]: https://saucelabs.com

node_modules/are-we-there-yet/node_modules/readable-stream/errors-browser.js

@@ -0,0 +1,127 @@
+'use strict';
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
+
+var codes = {};
+
+function createErrorType(code, message, Base) {
+  if (!Base) {
+    Base = Error;
+  }
+
+  function getMessage(arg1, arg2, arg3) {
+    if (typeof message === 'string') {
+      return message;
+    } else {
+      return message(arg1, arg2, arg3);
+    }
+  }
+
+  var NodeError =
+  /*#__PURE__*/
+  function (_Base) {
+    _inheritsLoose(NodeError, _Base);
+
+    function NodeError(arg1, arg2, arg3) {
+      return _Base.call(this, getMessage(arg1, arg2, arg3)) || this;
+    }
+
+    return NodeError;
+  }(Base);
+
+  NodeError.prototype.name = Base.name;
+  NodeError.prototype.code = code;
+  codes[code] = NodeError;
+} // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
+
+
+function oneOf(expected, thing) {
+  if (Array.isArray(expected)) {
+    var len = expected.length;
+    expected = expected.map(function (i) {
+      return String(i);
+    });
+
+    if (len > 2) {
+      return "one of ".concat(thing, " ").concat(expected.slice(0, len - 1).join(', '), ", or ") + expected[len - 1];
+    } else if (len === 2) {
+      return "one of ".concat(thing, " ").concat(expected[0], " or ").concat(expected[1]);
+    } else {
+      return "of ".concat(thing, " ").concat(expected[0]);
+    }
+  } else {
+    return "of ".concat(thing, " ").concat(String(expected));
+  }
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
+
+
+function startsWith(str, search, pos) {
+  return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
+
+
+function endsWith(str, search, this_len) {
+  if (this_len === undefined || this_len > str.length) {
+    this_len = str.length;
+  }
+
+  return str.substring(this_len - search.length, this_len) === search;
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
+
+
+function includes(str, search, start) {
+  if (typeof start !== 'number') {
+    start = 0;
+  }
+
+  if (start + search.length > str.length) {
+    return false;
+  } else {
+    return str.indexOf(search, start) !== -1;
+  }
+}
+
+createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
+  return 'The value "' + value + '" is invalid for option "' + name + '"';
+}, TypeError);
+createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
+  // determiner: 'must be' or 'must not be'
+  var determiner;
+
+  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
+    determiner = 'must not be';
+    expected = expected.replace(/^not /, '');
+  } else {
+    determiner = 'must be';
+  }
+
+  var msg;
+
+  if (endsWith(name, ' argument')) {
+    // For cases like 'first argument'
+    msg = "The ".concat(name, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
+  } else {
+    var type = includes(name, '.') ? 'property' : 'argument';
+    msg = "The \"".concat(name, "\" ").concat(type, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
+  }
+
+  msg += ". Received type ".concat(typeof actual);
+  return msg;
+}, TypeError);
+createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
+createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
+  return 'The ' + name + ' method is not implemented';
+});
+createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
+createErrorType('ERR_STREAM_DESTROYED', function (name) {
+  return 'Cannot call ' + name + ' after a stream was destroyed';
+});
+createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
+createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
+createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
+createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
+createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
+  return 'Unknown encoding: ' + arg;
+}, TypeError);
+createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
+module.exports.codes = codes;

node_modules/are-we-there-yet/node_modules/readable-stream/errors.js

@@ -0,0 +1,116 @@
+'use strict';
+
+const codes = {};
+
+function createErrorType(code, message, Base) {
+  if (!Base) {
+    Base = Error
+  }
+
+  function getMessage (arg1, arg2, arg3) {
+    if (typeof message === 'string') {
+      return message
+    } else {
+      return message(arg1, arg2, arg3)
+    }
+  }
+
+  class NodeError extends Base {
+    constructor (arg1, arg2, arg3) {
+      super(getMessage(arg1, arg2, arg3));
+    }
+  }
+
+  NodeError.prototype.name = Base.name;
+  NodeError.prototype.code = code;
+
+  codes[code] = NodeError;
+}
+
+// https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
+function oneOf(expected, thing) {
+  if (Array.isArray(expected)) {
+    const len = expected.length;
+    expected = expected.map((i) => String(i));
+    if (len > 2) {
+      return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or ` +
+             expected[len - 1];
+    } else if (len === 2) {
+      return `one of ${thing} ${expected[0]} or ${expected[1]}`;
+    } else {
+      return `of ${thing} ${expected[0]}`;
+    }
+  } else {
+    return `of ${thing} ${String(expected)}`;
+  }
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
+function startsWith(str, search, pos) {
+	return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
+function endsWith(str, search, this_len) {
+	if (this_len === undefined || this_len > str.length) {
+		this_len = str.length;
+	}
+	return str.substring(this_len - search.length, this_len) === search;
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
+function includes(str, search, start) {
+  if (typeof start !== 'number') {
+    start = 0;
+  }
+
+  if (start + search.length > str.length) {
+    return false;
+  } else {
+    return str.indexOf(search, start) !== -1;
+  }
+}
+
+createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
+  return 'The value "' + value + '" is invalid for option "' + name + '"'
+}, TypeError);
+createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
+  // determiner: 'must be' or 'must not be'
+  let determiner;
+  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
+    determiner = 'must not be';
+    expected = expected.replace(/^not /, '');
+  } else {
+    determiner = 'must be';
+  }
+
+  let msg;
+  if (endsWith(name, ' argument')) {
+    // For cases like 'first argument'
+    msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
+  } else {
+    const type = includes(name, '.') ? 'property' : 'argument';
+    msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
+  }
+
+  msg += `. Received type ${typeof actual}`;
+  return msg;
+}, TypeError);
+createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
+createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
+  return 'The ' + name + ' method is not implemented'
+});
+createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
+createErrorType('ERR_STREAM_DESTROYED', function (name) {
+  return 'Cannot call ' + name + ' after a stream was destroyed';
+});
+createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
+createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
+createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
+createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
+createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
+  return 'Unknown encoding: ' + arg
+}, TypeError);
+createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
+
+module.exports.codes = codes;

node_modules/are-we-there-yet/node_modules/readable-stream/experimentalWarning.js

@@ -0,0 +1,17 @@
+'use strict'
+
+var experimentalWarnings = new Set();
+
+function emitExperimentalWarning(feature) {
+  if (experimentalWarnings.has(feature)) return;
+  var msg = feature + ' is an experimental feature. This feature could ' +
+       'change at any time';
+  experimentalWarnings.add(feature);
+  process.emitWarning(msg, 'ExperimentalWarning');
+}
+
+function noop() {}
+
+module.exports.emitExperimentalWarning = process.emitWarning
+  ? emitExperimentalWarning
+  : noop;

node_modules/are-we-there-yet/node_modules/readable-stream/lib/_stream_duplex.js

@@ -0,0 +1,126 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototypal inheritance, this class
+// prototypally inherits from Readable, and then parasitically from
+// Writable.
+
+'use strict';
+
+/*<replacement>*/
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) keys.push(key);
+  return keys;
+};
+/*</replacement>*/
+
+module.exports = Duplex;
+const Readable = require('./_stream_readable');
+const Writable = require('./_stream_writable');
+require('inherits')(Duplex, Readable);
+{
+  // Allow the keys array to be GC'ed.
+  const keys = objectKeys(Writable.prototype);
+  for (var v = 0; v < keys.length; v++) {
+    const method = keys[v];
+    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
+  }
+}
+function Duplex(options) {
+  if (!(this instanceof Duplex)) return new Duplex(options);
+  Readable.call(this, options);
+  Writable.call(this, options);
+  this.allowHalfOpen = true;
+  if (options) {
+    if (options.readable === false) this.readable = false;
+    if (options.writable === false) this.writable = false;
+    if (options.allowHalfOpen === false) {
+      this.allowHalfOpen = false;
+      this.once('end', onend);
+    }
+  }
+}
+Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get() {
+    return this._writableState.highWaterMark;
+  }
+});
+Object.defineProperty(Duplex.prototype, 'writableBuffer', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState && this._writableState.getBuffer();
+  }
+});
+Object.defineProperty(Duplex.prototype, 'writableLength', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get() {
+    return this._writableState.length;
+  }
+});
+
+// the no-half-open enforcer
+function onend() {
+  // If the writable side ended, then we're ok.
+  if (this._writableState.ended) return;
+
+  // no more data can be written.
+  // But allow more writes to happen in this tick.
+  process.nextTick(onEndNT, this);
+}
+function onEndNT(self) {
+  self.end();
+}
+Object.defineProperty(Duplex.prototype, 'destroyed', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get() {
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return false;
+    }
+    return this._readableState.destroyed && this._writableState.destroyed;
+  },
+  set(value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._readableState.destroyed = value;
+    this._writableState.destroyed = value;
+  }
+});

node_modules/are-we-there-yet/node_modules/readable-stream/lib/_stream_passthrough.js

@@ -0,0 +1,37 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
+
+'use strict';
+
+module.exports = PassThrough;
+const Transform = require('./_stream_transform');
+require('inherits')(PassThrough, Transform);
+function PassThrough(options) {
+  if (!(this instanceof PassThrough)) return new PassThrough(options);
+  Transform.call(this, options);
+}
+PassThrough.prototype._transform = function (chunk, encoding, cb) {
+  cb(null, chunk);
+};

node_modules/are-we-there-yet/node_modules/readable-stream/lib/_stream_transform.js

@@ -0,0 +1,189 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
+
+'use strict';
+
+module.exports = Transform;
+const _require$codes = require('../errors').codes,
+  ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
+  ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,
+  ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;
+const Duplex = require('./_stream_duplex');
+require('inherits')(Transform, Duplex);
+function afterTransform(er, data) {
+  var ts = this._transformState;
+  ts.transforming = false;
+  var cb = ts.writecb;
+  if (cb === null) {
+    return this.emit('error', new ERR_MULTIPLE_CALLBACK());
+  }
+  ts.writechunk = null;
+  ts.writecb = null;
+  if (data != null)
+    // single equals check for both `null` and `undefined`
+    this.push(data);
+  cb(er);
+  var rs = this._readableState;
+  rs.reading = false;
+  if (rs.needReadable || rs.length < rs.highWaterMark) {
+    this._read(rs.highWaterMark);
+  }
+}
+function Transform(options) {
+  if (!(this instanceof Transform)) return new Transform(options);
+  Duplex.call(this, options);
+  this._transformState = {
+    afterTransform: afterTransform.bind(this),
+    needTransform: false,
+    transforming: false,
+    writecb: null,
+    writechunk: null,
+    writeencoding: null
+  };
+
+  // start out asking for a readable event once data is transformed.
+  this._readableState.needReadable = true;
+
+  // we have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false;
+  if (options) {
+    if (typeof options.transform === 'function') this._transform = options.transform;
+    if (typeof options.flush === 'function') this._flush = options.flush;
+  }
+
+  // When the writable side finishes, then flush out anything remaining.
+  this.on('prefinish', prefinish);
+}
+function prefinish() {
+  if (typeof this._flush === 'function' && !this._readableState.destroyed) {
+    this._flush((er, data) => {
+      done(this, er, data);
+    });
+  } else {
+    done(this, null, null);
+  }
+}
+Transform.prototype.push = function (chunk, encoding) {
+  this._transformState.needTransform = false;
+  return Duplex.prototype.push.call(this, chunk, encoding);
+};
+
+// This is the part where you do stuff!
+// override this function in implementation classes.
+// 'chunk' is an input chunk.
+//
+// Call `push(newChunk)` to pass along transformed output
+// to the readable side.  You may call 'push' zero or more times.
+//
+// Call `cb(err)` when you are done with this chunk.  If you pass
+// an error, then that'll put the hurt on the whole operation.  If you
+// never call cb(), then you'll never get another chunk.
+Transform.prototype._transform = function (chunk, encoding, cb) {
+  cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));
+};
+Transform.prototype._write = function (chunk, encoding, cb) {
+  var ts = this._transformState;
+  ts.writecb = cb;
+  ts.writechunk = chunk;
+  ts.writeencoding = encoding;
+  if (!ts.transforming) {
+    var rs = this._readableState;
+    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
+  }
+};
+
+// Doesn't matter what the args are here.
+// _transform does all the work.
+// That we got here means that the readable side wants more data.
+Transform.prototype._read = function (n) {
+  var ts = this._transformState;
+  if (ts.writechunk !== null && !ts.transforming) {
+    ts.transforming = true;
+    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
+  } else {
+    // mark that we need a transform, so that any data that comes in
+    // will get processed, now that we've asked for it.
+    ts.needTransform = true;
+  }
+};
+Transform.prototype._destroy = function (err, cb) {
+  Duplex.prototype._destroy.call(this, err, err2 => {
+    cb(err2);
+  });
+};
+function done(stream, er, data) {
+  if (er) return stream.emit('error', er);
+  if (data != null)
+    // single equals check for both `null` and `undefined`
+    stream.push(data);
+
+  // TODO(BridgeAR): Write a test for these two error cases
+  // if there's nothing in the write buffer, then that means
+  // that nothing more will ever be provided
+  if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();
+  if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();
+  return stream.push(null);
+}

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/async_iterator.js

@@ -0,0 +1,185 @@
+'use strict';
+
+const finished = require('./end-of-stream');
+const kLastResolve = Symbol('lastResolve');
+const kLastReject = Symbol('lastReject');
+const kError = Symbol('error');
+const kEnded = Symbol('ended');
+const kLastPromise = Symbol('lastPromise');
+const kHandlePromise = Symbol('handlePromise');
+const kStream = Symbol('stream');
+function createIterResult(value, done) {
+  return {
+    value,
+    done
+  };
+}
+function readAndResolve(iter) {
+  const resolve = iter[kLastResolve];
+  if (resolve !== null) {
+    const data = iter[kStream].read();
+    // we defer if data is null
+    // we can be expecting either 'end' or
+    // 'error'
+    if (data !== null) {
+      iter[kLastPromise] = null;
+      iter[kLastResolve] = null;
+      iter[kLastReject] = null;
+      resolve(createIterResult(data, false));
+    }
+  }
+}
+function onReadable(iter) {
+  // we wait for the next tick, because it might
+  // emit an error with process.nextTick
+  process.nextTick(readAndResolve, iter);
+}
+function wrapForNext(lastPromise, iter) {
+  return (resolve, reject) => {
+    lastPromise.then(() => {
+      if (iter[kEnded]) {
+        resolve(createIterResult(undefined, true));
+        return;
+      }
+      iter[kHandlePromise](resolve, reject);
+    }, reject);
+  };
+}
+const AsyncIteratorPrototype = Object.getPrototypeOf(function () {});
+const ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf({
+  get stream() {
+    return this[kStream];
+  },
+  next() {
+    // if we have detected an error in the meanwhile
+    // reject straight away
+    const error = this[kError];
+    if (error !== null) {
+      return Promise.reject(error);
+    }
+    if (this[kEnded]) {
+      return Promise.resolve(createIterResult(undefined, true));
+    }
+    if (this[kStream].destroyed) {
+      // We need to defer via nextTick because if .destroy(err) is
+      // called, the error will be emitted via nextTick, and
+      // we cannot guarantee that there is no error lingering around
+      // waiting to be emitted.
+      return new Promise((resolve, reject) => {
+        process.nextTick(() => {
+          if (this[kError]) {
+            reject(this[kError]);
+          } else {
+            resolve(createIterResult(undefined, true));
+          }
+        });
+      });
+    }
+
+    // if we have multiple next() calls
+    // we will wait for the previous Promise to finish
+    // this logic is optimized to support for await loops,
+    // where next() is only called once at a time
+    const lastPromise = this[kLastPromise];
+    let promise;
+    if (lastPromise) {
+      promise = new Promise(wrapForNext(lastPromise, this));
+    } else {
+      // fast path needed to support multiple this.push()
+      // without triggering the next() queue
+      const data = this[kStream].read();
+      if (data !== null) {
+        return Promise.resolve(createIterResult(data, false));
+      }
+      promise = new Promise(this[kHandlePromise]);
+    }
+    this[kLastPromise] = promise;
+    return promise;
+  },
+  [Symbol.asyncIterator]() {
+    return this;
+  },
+  return() {
+    // destroy(err, cb) is a private API
+    // we can guarantee we have that here, because we control the
+    // Readable class this is attached to
+    return new Promise((resolve, reject) => {
+      this[kStream].destroy(null, err => {
+        if (err) {
+          reject(err);
+          return;
+        }
+        resolve(createIterResult(undefined, true));
+      });
+    });
+  }
+}, AsyncIteratorPrototype);
+const createReadableStreamAsyncIterator = stream => {
+  const iterator = Object.create(ReadableStreamAsyncIteratorPrototype, {
+    [kStream]: {
+      value: stream,
+      writable: true
+    },
+    [kLastResolve]: {
+      value: null,
+      writable: true
+    },
+    [kLastReject]: {
+      value: null,
+      writable: true
+    },
+    [kError]: {
+      value: null,
+      writable: true
+    },
+    [kEnded]: {
+      value: stream._readableState.endEmitted,
+      writable: true
+    },
+    // the function passed to new Promise
+    // is cached so we avoid allocating a new
+    // closure at every run
+    [kHandlePromise]: {
+      value: (resolve, reject) => {
+        const data = iterator[kStream].read();
+        if (data) {
+          iterator[kLastPromise] = null;
+          iterator[kLastResolve] = null;
+          iterator[kLastReject] = null;
+          resolve(createIterResult(data, false));
+        } else {
+          iterator[kLastResolve] = resolve;
+          iterator[kLastReject] = reject;
+        }
+      },
+      writable: true
+    }
+  });
+  iterator[kLastPromise] = null;
+  finished(stream, err => {
+    if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {
+      const reject = iterator[kLastReject];
+      // reject if we are waiting for data in the Promise
+      // returned by next() and store the error
+      if (reject !== null) {
+        iterator[kLastPromise] = null;
+        iterator[kLastResolve] = null;
+        iterator[kLastReject] = null;
+        reject(err);
+      }
+      iterator[kError] = err;
+      return;
+    }
+    const resolve = iterator[kLastResolve];
+    if (resolve !== null) {
+      iterator[kLastPromise] = null;
+      iterator[kLastResolve] = null;
+      iterator[kLastReject] = null;
+      resolve(createIterResult(undefined, true));
+    }
+    iterator[kEnded] = true;
+  });
+  stream.on('readable', onReadable.bind(null, iterator));
+  return iterator;
+};
+module.exports = createReadableStreamAsyncIterator;

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/buffer_list.js

@@ -0,0 +1,155 @@
+'use strict';
+
+function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+const _require = require('buffer'),
+  Buffer = _require.Buffer;
+const _require2 = require('util'),
+  inspect = _require2.inspect;
+const custom = inspect && inspect.custom || 'inspect';
+function copyBuffer(src, target, offset) {
+  Buffer.prototype.copy.call(src, target, offset);
+}
+module.exports = class BufferList {
+  constructor() {
+    this.head = null;
+    this.tail = null;
+    this.length = 0;
+  }
+  push(v) {
+    const entry = {
+      data: v,
+      next: null
+    };
+    if (this.length > 0) this.tail.next = entry;else this.head = entry;
+    this.tail = entry;
+    ++this.length;
+  }
+  unshift(v) {
+    const entry = {
+      data: v,
+      next: this.head
+    };
+    if (this.length === 0) this.tail = entry;
+    this.head = entry;
+    ++this.length;
+  }
+  shift() {
+    if (this.length === 0) return;
+    const ret = this.head.data;
+    if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
+    --this.length;
+    return ret;
+  }
+  clear() {
+    this.head = this.tail = null;
+    this.length = 0;
+  }
+  join(s) {
+    if (this.length === 0) return '';
+    var p = this.head;
+    var ret = '' + p.data;
+    while (p = p.next) ret += s + p.data;
+    return ret;
+  }
+  concat(n) {
+    if (this.length === 0) return Buffer.alloc(0);
+    const ret = Buffer.allocUnsafe(n >>> 0);
+    var p = this.head;
+    var i = 0;
+    while (p) {
+      copyBuffer(p.data, ret, i);
+      i += p.data.length;
+      p = p.next;
+    }
+    return ret;
+  }
+
+  // Consumes a specified amount of bytes or characters from the buffered data.
+  consume(n, hasStrings) {
+    var ret;
+    if (n < this.head.data.length) {
+      // `slice` is the same for buffers and strings.
+      ret = this.head.data.slice(0, n);
+      this.head.data = this.head.data.slice(n);
+    } else if (n === this.head.data.length) {
+      // First chunk is a perfect match.
+      ret = this.shift();
+    } else {
+      // Result spans more than one buffer.
+      ret = hasStrings ? this._getString(n) : this._getBuffer(n);
+    }
+    return ret;
+  }
+  first() {
+    return this.head.data;
+  }
+
+  // Consumes a specified amount of characters from the buffered data.
+  _getString(n) {
+    var p = this.head;
+    var c = 1;
+    var ret = p.data;
+    n -= ret.length;
+    while (p = p.next) {
+      const str = p.data;
+      const nb = n > str.length ? str.length : n;
+      if (nb === str.length) ret += str;else ret += str.slice(0, n);
+      n -= nb;
+      if (n === 0) {
+        if (nb === str.length) {
+          ++c;
+          if (p.next) this.head = p.next;else this.head = this.tail = null;
+        } else {
+          this.head = p;
+          p.data = str.slice(nb);
+        }
+        break;
+      }
+      ++c;
+    }
+    this.length -= c;
+    return ret;
+  }
+
+  // Consumes a specified amount of bytes from the buffered data.
+  _getBuffer(n) {
+    const ret = Buffer.allocUnsafe(n);
+    var p = this.head;
+    var c = 1;
+    p.data.copy(ret);
+    n -= p.data.length;
+    while (p = p.next) {
+      const buf = p.data;
+      const nb = n > buf.length ? buf.length : n;
+      buf.copy(ret, ret.length - n, 0, nb);
+      n -= nb;
+      if (n === 0) {
+        if (nb === buf.length) {
+          ++c;
+          if (p.next) this.head = p.next;else this.head = this.tail = null;
+        } else {
+          this.head = p;
+          p.data = buf.slice(nb);
+        }
+        break;
+      }
+      ++c;
+    }
+    this.length -= c;
+    return ret;
+  }
+
+  // Make sure the linked list only shows the minimal necessary information.
+  [custom](_, options) {
+    return inspect(this, _objectSpread(_objectSpread({}, options), {}, {
+      // Only inspect one level.
+      depth: 0,
+      // It should not recurse.
+      customInspect: false
+    }));
+  }
+};

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/destroy.js

@@ -0,0 +1,95 @@
+'use strict';
+
+// undocumented cb() API, needed for core, not for public API
+function destroy(err, cb) {
+  const readableDestroyed = this._readableState && this._readableState.destroyed;
+  const writableDestroyed = this._writableState && this._writableState.destroyed;
+  if (readableDestroyed || writableDestroyed) {
+    if (cb) {
+      cb(err);
+    } else if (err) {
+      if (!this._writableState) {
+        process.nextTick(emitErrorNT, this, err);
+      } else if (!this._writableState.errorEmitted) {
+        this._writableState.errorEmitted = true;
+        process.nextTick(emitErrorNT, this, err);
+      }
+    }
+    return this;
+  }
+
+  // we set destroyed to true before firing error callbacks in order
+  // to make it re-entrance safe in case destroy() is called within callbacks
+
+  if (this._readableState) {
+    this._readableState.destroyed = true;
+  }
+
+  // if this is a duplex stream mark the writable part as destroyed as well
+  if (this._writableState) {
+    this._writableState.destroyed = true;
+  }
+  this._destroy(err || null, err => {
+    if (!cb && err) {
+      if (!this._writableState) {
+        process.nextTick(emitErrorAndCloseNT, this, err);
+      } else if (!this._writableState.errorEmitted) {
+        this._writableState.errorEmitted = true;
+        process.nextTick(emitErrorAndCloseNT, this, err);
+      } else {
+        process.nextTick(emitCloseNT, this);
+      }
+    } else if (cb) {
+      process.nextTick(emitCloseNT, this);
+      cb(err);
+    } else {
+      process.nextTick(emitCloseNT, this);
+    }
+  });
+  return this;
+}
+function emitErrorAndCloseNT(self, err) {
+  emitErrorNT(self, err);
+  emitCloseNT(self);
+}
+function emitCloseNT(self) {
+  if (self._writableState && !self._writableState.emitClose) return;
+  if (self._readableState && !self._readableState.emitClose) return;
+  self.emit('close');
+}
+function undestroy() {
+  if (this._readableState) {
+    this._readableState.destroyed = false;
+    this._readableState.reading = false;
+    this._readableState.ended = false;
+    this._readableState.endEmitted = false;
+  }
+  if (this._writableState) {
+    this._writableState.destroyed = false;
+    this._writableState.ended = false;
+    this._writableState.ending = false;
+    this._writableState.finalCalled = false;
+    this._writableState.prefinished = false;
+    this._writableState.finished = false;
+    this._writableState.errorEmitted = false;
+  }
+}
+function emitErrorNT(self, err) {
+  self.emit('error', err);
+}
+function errorOrDestroy(stream, err) {
+  // We have tests that rely on errors being emitted
+  // in the same tick, so changing this is semver major.
+  // For now when you opt-in to autoDestroy we allow
+  // the error to be emitted nextTick. In a future
+  // semver major update we should change the default to this.
+
+  const rState = stream._readableState;
+  const wState = stream._writableState;
+  if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);
+}
+module.exports = {
+  destroy,
+  undestroy,
+  errorOrDestroy
+};

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/end-of-stream.js

@@ -0,0 +1,86 @@
+// Ported from https://github.com/mafintosh/end-of-stream with
+// permission from the author, Mathias Buus (@mafintosh).
+
+'use strict';
+
+const ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;
+function once(callback) {
+  let called = false;
+  return function () {
+    if (called) return;
+    called = true;
+    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+      args[_key] = arguments[_key];
+    }
+    callback.apply(this, args);
+  };
+}
+function noop() {}
+function isRequest(stream) {
+  return stream.setHeader && typeof stream.abort === 'function';
+}
+function eos(stream, opts, callback) {
+  if (typeof opts === 'function') return eos(stream, null, opts);
+  if (!opts) opts = {};
+  callback = once(callback || noop);
+  let readable = opts.readable || opts.readable !== false && stream.readable;
+  let writable = opts.writable || opts.writable !== false && stream.writable;
+  const onlegacyfinish = () => {
+    if (!stream.writable) onfinish();
+  };
+  var writableEnded = stream._writableState && stream._writableState.finished;
+  const onfinish = () => {
+    writable = false;
+    writableEnded = true;
+    if (!readable) callback.call(stream);
+  };
+  var readableEnded = stream._readableState && stream._readableState.endEmitted;
+  const onend = () => {
+    readable = false;
+    readableEnded = true;
+    if (!writable) callback.call(stream);
+  };
+  const onerror = err => {
+    callback.call(stream, err);
+  };
+  const onclose = () => {
+    let err;
+    if (readable && !readableEnded) {
+      if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
+      return callback.call(stream, err);
+    }
+    if (writable && !writableEnded) {
+      if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
+      return callback.call(stream, err);
+    }
+  };
+  const onrequest = () => {
+    stream.req.on('finish', onfinish);
+  };
+  if (isRequest(stream)) {
+    stream.on('complete', onfinish);
+    stream.on('abort', onclose);
+    if (stream.req) onrequest();else stream.on('request', onrequest);
+  } else if (writable && !stream._writableState) {
+    // legacy streams
+    stream.on('end', onlegacyfinish);
+    stream.on('close', onlegacyfinish);
+  }
+  stream.on('end', onend);
+  stream.on('finish', onfinish);
+  if (opts.error !== false) stream.on('error', onerror);
+  stream.on('close', onclose);
+  return function () {
+    stream.removeListener('complete', onfinish);
+    stream.removeListener('abort', onclose);
+    stream.removeListener('request', onrequest);
+    if (stream.req) stream.req.removeListener('finish', onfinish);
+    stream.removeListener('end', onlegacyfinish);
+    stream.removeListener('close', onlegacyfinish);
+    stream.removeListener('finish', onfinish);
+    stream.removeListener('end', onend);
+    stream.removeListener('error', onerror);
+    stream.removeListener('close', onclose);
+  };
+}
+module.exports = eos;

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/from-browser.js

@@ -0,0 +1,3 @@
+module.exports = function () {
+  throw new Error('Readable.from is not available in the browser')
+};

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/from.js

@@ -0,0 +1,52 @@
+'use strict';
+
+function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
+function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
+function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+const ERR_INVALID_ARG_TYPE = require('../../../errors').codes.ERR_INVALID_ARG_TYPE;
+function from(Readable, iterable, opts) {
+  let iterator;
+  if (iterable && typeof iterable.next === 'function') {
+    iterator = iterable;
+  } else if (iterable && iterable[Symbol.asyncIterator]) iterator = iterable[Symbol.asyncIterator]();else if (iterable && iterable[Symbol.iterator]) iterator = iterable[Symbol.iterator]();else throw new ERR_INVALID_ARG_TYPE('iterable', ['Iterable'], iterable);
+  const readable = new Readable(_objectSpread({
+    objectMode: true
+  }, opts));
+  // Reading boolean to protect against _read
+  // being called before last iteration completion.
+  let reading = false;
+  readable._read = function () {
+    if (!reading) {
+      reading = true;
+      next();
+    }
+  };
+  function next() {
+    return _next2.apply(this, arguments);
+  }
+  function _next2() {
+    _next2 = _asyncToGenerator(function* () {
+      try {
+        const _yield$iterator$next = yield iterator.next(),
+          value = _yield$iterator$next.value,
+          done = _yield$iterator$next.done;
+        if (done) {
+          readable.push(null);
+        } else if (readable.push(yield value)) {
+          next();
+        } else {
+          reading = false;
+        }
+      } catch (err) {
+        readable.destroy(err);
+      }
+    });
+    return _next2.apply(this, arguments);
+  }
+  return readable;
+}
+module.exports = from;

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/pipeline.js

@@ -0,0 +1,86 @@
+// Ported from https://github.com/mafintosh/pump with
+// permission from the author, Mathias Buus (@mafintosh).
+
+'use strict';
+
+let eos;
+function once(callback) {
+  let called = false;
+  return function () {
+    if (called) return;
+    called = true;
+    callback(...arguments);
+  };
+}
+const _require$codes = require('../../../errors').codes,
+  ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,
+  ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;
+function noop(err) {
+  // Rethrow the error if it exists to avoid swallowing it
+  if (err) throw err;
+}
+function isRequest(stream) {
+  return stream.setHeader && typeof stream.abort === 'function';
+}
+function destroyer(stream, reading, writing, callback) {
+  callback = once(callback);
+  let closed = false;
+  stream.on('close', () => {
+    closed = true;
+  });
+  if (eos === undefined) eos = require('./end-of-stream');
+  eos(stream, {
+    readable: reading,
+    writable: writing
+  }, err => {
+    if (err) return callback(err);
+    closed = true;
+    callback();
+  });
+  let destroyed = false;
+  return err => {
+    if (closed) return;
+    if (destroyed) return;
+    destroyed = true;
+
+    // request.destroy just do .end - .abort is what we want
+    if (isRequest(stream)) return stream.abort();
+    if (typeof stream.destroy === 'function') return stream.destroy();
+    callback(err || new ERR_STREAM_DESTROYED('pipe'));
+  };
+}
+function call(fn) {
+  fn();
+}
+function pipe(from, to) {
+  return from.pipe(to);
+}
+function popCallback(streams) {
+  if (!streams.length) return noop;
+  if (typeof streams[streams.length - 1] !== 'function') return noop;
+  return streams.pop();
+}
+function pipeline() {
+  for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {
+    streams[_key] = arguments[_key];
+  }
+  const callback = popCallback(streams);
+  if (Array.isArray(streams[0])) streams = streams[0];
+  if (streams.length < 2) {
+    throw new ERR_MISSING_ARGS('streams');
+  }
+  let error;
+  const destroys = streams.map(function (stream, i) {
+    const reading = i < streams.length - 1;
+    const writing = i > 0;
+    return destroyer(stream, reading, writing, function (err) {
+      if (!error) error = err;
+      if (err) destroys.forEach(call);
+      if (reading) return;
+      destroys.forEach(call);
+      callback(error);
+    });
+  });
+  return streams.reduce(pipe);
+}
+module.exports = pipeline;

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/state.js

@@ -0,0 +1,22 @@
+'use strict';
+
+const ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
+function highWaterMarkFrom(options, isDuplex, duplexKey) {
+  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
+}
+function getHighWaterMark(state, options, duplexKey, isDuplex) {
+  const hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
+  if (hwm != null) {
+    if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
+      const name = isDuplex ? duplexKey : 'highWaterMark';
+      throw new ERR_INVALID_OPT_VALUE(name, hwm);
+    }
+    return Math.floor(hwm);
+  }
+
+  // Default value
+  return state.objectMode ? 16 : 16 * 1024;
+}
+module.exports = {
+  getHighWaterMark
+};

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/stream-browser.js

@@ -0,0 +1 @@
+module.exports = require('events').EventEmitter;

node_modules/are-we-there-yet/node_modules/readable-stream/lib/internal/streams/stream.js

@@ -0,0 +1 @@
+module.exports = require('stream');

node_modules/are-we-there-yet/node_modules/readable-stream/package.json

@@ -0,0 +1,68 @@
+{
+  "name": "readable-stream",
+  "version": "3.6.1",
+  "description": "Streams3, a user-land copy of the stream library from Node.js",
+  "main": "readable.js",
+  "engines": {
+    "node": ">= 6"
+  },
+  "dependencies": {
+    "inherits": "^2.0.3",
+    "string_decoder": "^1.1.1",
+    "util-deprecate": "^1.0.1"
+  },
+  "devDependencies": {
+    "@babel/cli": "^7.2.0",
+    "@babel/core": "^7.2.0",
+    "@babel/polyfill": "^7.0.0",
+    "@babel/preset-env": "^7.2.0",
+    "airtap": "0.0.9",
+    "assert": "^1.4.0",
+    "bl": "^2.0.0",
+    "deep-strict-equal": "^0.2.0",
+    "events.once": "^2.0.2",
+    "glob": "^7.1.2",
+    "gunzip-maybe": "^1.4.1",
+    "hyperquest": "^2.1.3",
+    "lolex": "^2.6.0",
+    "nyc": "^11.0.0",
+    "pump": "^3.0.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.0",
+    "tape": "^4.9.0",
+    "tar-fs": "^1.16.2",
+    "util-promisify": "^2.1.0"
+  },
+  "scripts": {
+    "test": "tap -J --no-esm test/parallel/*.js test/ours/*.js",
+    "ci": "TAP=1 tap --no-esm test/parallel/*.js test/ours/*.js | tee test.tap",
+    "test-browsers": "airtap --sauce-connect --loopback airtap.local -- test/browser.js",
+    "test-browser-local": "airtap --open --local -- test/browser.js",
+    "cover": "nyc npm test",
+    "report": "nyc report --reporter=lcov",
+    "update-browser-errors": "babel -o errors-browser.js errors.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/nodejs/readable-stream"
+  },
+  "keywords": [
+    "readable",
+    "stream",
+    "pipe"
+  ],
+  "browser": {
+    "util": false,
+    "worker_threads": false,
+    "./errors": "./errors-browser.js",
+    "./readable.js": "./readable-browser.js",
+    "./lib/internal/streams/from.js": "./lib/internal/streams/from-browser.js",
+    "./lib/internal/streams/stream.js": "./lib/internal/streams/stream-browser.js"
+  },
+  "nyc": {
+    "include": [
+      "lib/**.js"
+    ]
+  },
+  "license": "MIT"
+}

node_modules/are-we-there-yet/node_modules/readable-stream/readable-browser.js

@@ -0,0 +1,9 @@
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Stream = exports;
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
+exports.finished = require('./lib/internal/streams/end-of-stream.js');
+exports.pipeline = require('./lib/internal/streams/pipeline.js');

node_modules/are-we-there-yet/node_modules/readable-stream/readable.js

@@ -0,0 +1,16 @@
+var Stream = require('stream');
+if (process.env.READABLE_STREAM === 'disable' && Stream) {
+  module.exports = Stream.Readable;
+  Object.assign(module.exports, Stream);
+  module.exports.Stream = Stream;
+} else {
+  exports = module.exports = require('./lib/_stream_readable.js');
+  exports.Stream = Stream || exports;
+  exports.Readable = exports;
+  exports.Writable = require('./lib/_stream_writable.js');
+  exports.Duplex = require('./lib/_stream_duplex.js');
+  exports.Transform = require('./lib/_stream_transform.js');
+  exports.PassThrough = require('./lib/_stream_passthrough.js');
+  exports.finished = require('./lib/internal/streams/end-of-stream.js');
+  exports.pipeline = require('./lib/internal/streams/pipeline.js');
+}

node_modules/are-we-there-yet/package.json

@@ -0,0 +1,56 @@
+{
+  "name": "are-we-there-yet",
+  "version": "3.0.1",
+  "description": "Keep track of the overall completion of many disparate processes",
+  "main": "lib/index.js",
+  "scripts": {
+    "test": "tap",
+    "npmclilint": "npmcli-lint",
+    "lint": "eslint \"**/*.js\"",
+    "lintfix": "npm run lint -- --fix",
+    "posttest": "npm run lint",
+    "postsnap": "npm run lintfix --",
+    "preversion": "npm test",
+    "postversion": "npm publish",
+    "prepublishOnly": "git push origin --follow-tags",
+    "snap": "tap",
+    "postlint": "template-oss-check",
+    "template-oss-apply": "template-oss-apply --force"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/npm/are-we-there-yet.git"
+  },
+  "author": "GitHub Inc.",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/npm/are-we-there-yet/issues"
+  },
+  "homepage": "https://github.com/npm/are-we-there-yet",
+  "devDependencies": {
+    "@npmcli/eslint-config": "^3.0.1",
+    "@npmcli/template-oss": "3.5.0",
+    "tap": "^16.0.1"
+  },
+  "dependencies": {
+    "delegates": "^1.0.0",
+    "readable-stream": "^3.6.0"
+  },
+  "files": [
+    "bin/",
+    "lib/"
+  ],
+  "engines": {
+    "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
+  },
+  "tap": {
+    "branches": 68,
+    "statements": 92,
+    "functions": 86,
+    "lines": 92
+  },
+  "templateOSS": {
+    "//@npmcli/template-oss": "This file is partially managed by @npmcli/template-oss. Edits may be overwritten.",
+    "version": "3.5.0"
+  }
+}