Index: node_modules/minizlib/index.js
===================================================================
--- node_modules/minizlib/index.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/minizlib/index.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,348 @@
+'use strict'
+
+const assert = require('assert')
+const Buffer = require('buffer').Buffer
+const realZlib = require('zlib')
+
+const constants = exports.constants = require('./constants.js')
+const Minipass = require('minipass')
+
+const OriginalBufferConcat = Buffer.concat
+
+const _superWrite = Symbol('_superWrite')
+class ZlibError extends Error {
+  constructor (err) {
+    super('zlib: ' + err.message)
+    this.code = err.code
+    this.errno = err.errno
+    /* istanbul ignore if */
+    if (!this.code)
+      this.code = 'ZLIB_ERROR'
+
+    this.message = 'zlib: ' + err.message
+    Error.captureStackTrace(this, this.constructor)
+  }
+
+  get name () {
+    return 'ZlibError'
+  }
+}
+
+// the Zlib class they all inherit from
+// This thing manages the queue of requests, and returns
+// true or false if there is anything in the queue when
+// you call the .write() method.
+const _opts = Symbol('opts')
+const _flushFlag = Symbol('flushFlag')
+const _finishFlushFlag = Symbol('finishFlushFlag')
+const _fullFlushFlag = Symbol('fullFlushFlag')
+const _handle = Symbol('handle')
+const _onError = Symbol('onError')
+const _sawError = Symbol('sawError')
+const _level = Symbol('level')
+const _strategy = Symbol('strategy')
+const _ended = Symbol('ended')
+const _defaultFullFlush = Symbol('_defaultFullFlush')
+
+class ZlibBase extends Minipass {
+  constructor (opts, mode) {
+    if (!opts || typeof opts !== 'object')
+      throw new TypeError('invalid options for ZlibBase constructor')
+
+    super(opts)
+    this[_sawError] = false
+    this[_ended] = false
+    this[_opts] = opts
+
+    this[_flushFlag] = opts.flush
+    this[_finishFlushFlag] = opts.finishFlush
+    // this will throw if any options are invalid for the class selected
+    try {
+      this[_handle] = new realZlib[mode](opts)
+    } catch (er) {
+      // make sure that all errors get decorated properly
+      throw new ZlibError(er)
+    }
+
+    this[_onError] = (err) => {
+      // no sense raising multiple errors, since we abort on the first one.
+      if (this[_sawError])
+        return
+
+      this[_sawError] = true
+
+      // there is no way to cleanly recover.
+      // continuing only obscures problems.
+      this.close()
+      this.emit('error', err)
+    }
+
+    this[_handle].on('error', er => this[_onError](new ZlibError(er)))
+    this.once('end', () => this.close)
+  }
+
+  close () {
+    if (this[_handle]) {
+      this[_handle].close()
+      this[_handle] = null
+      this.emit('close')
+    }
+  }
+
+  reset () {
+    if (!this[_sawError]) {
+      assert(this[_handle], 'zlib binding closed')
+      return this[_handle].reset()
+    }
+  }
+
+  flush (flushFlag) {
+    if (this.ended)
+      return
+
+    if (typeof flushFlag !== 'number')
+      flushFlag = this[_fullFlushFlag]
+    this.write(Object.assign(Buffer.alloc(0), { [_flushFlag]: flushFlag }))
+  }
+
+  end (chunk, encoding, cb) {
+    if (chunk)
+      this.write(chunk, encoding)
+    this.flush(this[_finishFlushFlag])
+    this[_ended] = true
+    return super.end(null, null, cb)
+  }
+
+  get ended () {
+    return this[_ended]
+  }
+
+  write (chunk, encoding, cb) {
+    // process the chunk using the sync process
+    // then super.write() all the outputted chunks
+    if (typeof encoding === 'function')
+      cb = encoding, encoding = 'utf8'
+
+    if (typeof chunk === 'string')
+      chunk = Buffer.from(chunk, encoding)
+
+    if (this[_sawError])
+      return
+    assert(this[_handle], 'zlib binding closed')
+
+    // _processChunk tries to .close() the native handle after it's done, so we
+    // intercept that by temporarily making it a no-op.
+    const nativeHandle = this[_handle]._handle
+    const originalNativeClose = nativeHandle.close
+    nativeHandle.close = () => {}
+    const originalClose = this[_handle].close
+    this[_handle].close = () => {}
+    // It also calls `Buffer.concat()` at the end, which may be convenient
+    // for some, but which we are not interested in as it slows us down.
+    Buffer.concat = (args) => args
+    let result
+    try {
+      const flushFlag = typeof chunk[_flushFlag] === 'number'
+        ? chunk[_flushFlag] : this[_flushFlag]
+      result = this[_handle]._processChunk(chunk, flushFlag)
+      // if we don't throw, reset it back how it was
+      Buffer.concat = OriginalBufferConcat
+    } catch (err) {
+      // or if we do, put Buffer.concat() back before we emit error
+      // Error events call into user code, which may call Buffer.concat()
+      Buffer.concat = OriginalBufferConcat
+      this[_onError](new ZlibError(err))
+    } finally {
+      if (this[_handle]) {
+        // Core zlib resets `_handle` to null after attempting to close the
+        // native handle. Our no-op handler prevented actual closure, but we
+        // need to restore the `._handle` property.
+        this[_handle]._handle = nativeHandle
+        nativeHandle.close = originalNativeClose
+        this[_handle].close = originalClose
+        // `_processChunk()` adds an 'error' listener. If we don't remove it
+        // after each call, these handlers start piling up.
+        this[_handle].removeAllListeners('error')
+        // make sure OUR error listener is still attached tho
+      }
+    }
+
+    if (this[_handle])
+      this[_handle].on('error', er => this[_onError](new ZlibError(er)))
+
+    let writeReturn
+    if (result) {
+      if (Array.isArray(result) && result.length > 0) {
+        // The first buffer is always `handle._outBuffer`, which would be
+        // re-used for later invocations; so, we always have to copy that one.
+        writeReturn = this[_superWrite](Buffer.from(result[0]))
+        for (let i = 1; i < result.length; i++) {
+          writeReturn = this[_superWrite](result[i])
+        }
+      } else {
+        writeReturn = this[_superWrite](Buffer.from(result))
+      }
+    }
+
+    if (cb)
+      cb()
+    return writeReturn
+  }
+
+  [_superWrite] (data) {
+    return super.write(data)
+  }
+}
+
+class Zlib extends ZlibBase {
+  constructor (opts, mode) {
+    opts = opts || {}
+
+    opts.flush = opts.flush || constants.Z_NO_FLUSH
+    opts.finishFlush = opts.finishFlush || constants.Z_FINISH
+    super(opts, mode)
+
+    this[_fullFlushFlag] = constants.Z_FULL_FLUSH
+    this[_level] = opts.level
+    this[_strategy] = opts.strategy
+  }
+
+  params (level, strategy) {
+    if (this[_sawError])
+      return
+
+    if (!this[_handle])
+      throw new Error('cannot switch params when binding is closed')
+
+    // no way to test this without also not supporting params at all
+    /* istanbul ignore if */
+    if (!this[_handle].params)
+      throw new Error('not supported in this implementation')
+
+    if (this[_level] !== level || this[_strategy] !== strategy) {
+      this.flush(constants.Z_SYNC_FLUSH)
+      assert(this[_handle], 'zlib binding closed')
+      // .params() calls .flush(), but the latter is always async in the
+      // core zlib. We override .flush() temporarily to intercept that and
+      // flush synchronously.
+      const origFlush = this[_handle].flush
+      this[_handle].flush = (flushFlag, cb) => {
+        this.flush(flushFlag)
+        cb()
+      }
+      try {
+        this[_handle].params(level, strategy)
+      } finally {
+        this[_handle].flush = origFlush
+      }
+      /* istanbul ignore else */
+      if (this[_handle]) {
+        this[_level] = level
+        this[_strategy] = strategy
+      }
+    }
+  }
+}
+
+// minimal 2-byte header
+class Deflate extends Zlib {
+  constructor (opts) {
+    super(opts, 'Deflate')
+  }
+}
+
+class Inflate extends Zlib {
+  constructor (opts) {
+    super(opts, 'Inflate')
+  }
+}
+
+// gzip - bigger header, same deflate compression
+const _portable = Symbol('_portable')
+class Gzip extends Zlib {
+  constructor (opts) {
+    super(opts, 'Gzip')
+    this[_portable] = opts && !!opts.portable
+  }
+
+  [_superWrite] (data) {
+    if (!this[_portable])
+      return super[_superWrite](data)
+
+    // we'll always get the header emitted in one first chunk
+    // overwrite the OS indicator byte with 0xFF
+    this[_portable] = false
+    data[9] = 255
+    return super[_superWrite](data)
+  }
+}
+
+class Gunzip extends Zlib {
+  constructor (opts) {
+    super(opts, 'Gunzip')
+  }
+}
+
+// raw - no header
+class DeflateRaw extends Zlib {
+  constructor (opts) {
+    super(opts, 'DeflateRaw')
+  }
+}
+
+class InflateRaw extends Zlib {
+  constructor (opts) {
+    super(opts, 'InflateRaw')
+  }
+}
+
+// auto-detect header.
+class Unzip extends Zlib {
+  constructor (opts) {
+    super(opts, 'Unzip')
+  }
+}
+
+class Brotli extends ZlibBase {
+  constructor (opts, mode) {
+    opts = opts || {}
+
+    opts.flush = opts.flush || constants.BROTLI_OPERATION_PROCESS
+    opts.finishFlush = opts.finishFlush || constants.BROTLI_OPERATION_FINISH
+
+    super(opts, mode)
+
+    this[_fullFlushFlag] = constants.BROTLI_OPERATION_FLUSH
+  }
+}
+
+class BrotliCompress extends Brotli {
+  constructor (opts) {
+    super(opts, 'BrotliCompress')
+  }
+}
+
+class BrotliDecompress extends Brotli {
+  constructor (opts) {
+    super(opts, 'BrotliDecompress')
+  }
+}
+
+exports.Deflate = Deflate
+exports.Inflate = Inflate
+exports.Gzip = Gzip
+exports.Gunzip = Gunzip
+exports.DeflateRaw = DeflateRaw
+exports.InflateRaw = InflateRaw
+exports.Unzip = Unzip
+/* istanbul ignore else */
+if (typeof realZlib.BrotliCompress === 'function') {
+  exports.BrotliCompress = BrotliCompress
+  exports.BrotliDecompress = BrotliDecompress
+} else {
+  exports.BrotliCompress = exports.BrotliDecompress = class {
+    constructor () {
+      throw new Error('Brotli is not supported in this version of Node.js')
+    }
+  }
+}