Index: node_modules/bl/bl.js
===================================================================
--- node_modules/bl/bl.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/bl/bl.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,84 @@
+'use strict'
+
+const DuplexStream = require('readable-stream').Duplex
+const inherits = require('inherits')
+const BufferList = require('./BufferList')
+
+function BufferListStream (callback) {
+  if (!(this instanceof BufferListStream)) {
+    return new BufferListStream(callback)
+  }
+
+  if (typeof callback === 'function') {
+    this._callback = callback
+
+    const piper = function piper (err) {
+      if (this._callback) {
+        this._callback(err)
+        this._callback = null
+      }
+    }.bind(this)
+
+    this.on('pipe', function onPipe (src) {
+      src.on('error', piper)
+    })
+    this.on('unpipe', function onUnpipe (src) {
+      src.removeListener('error', piper)
+    })
+
+    callback = null
+  }
+
+  BufferList._init.call(this, callback)
+  DuplexStream.call(this)
+}
+
+inherits(BufferListStream, DuplexStream)
+Object.assign(BufferListStream.prototype, BufferList.prototype)
+
+BufferListStream.prototype._new = function _new (callback) {
+  return new BufferListStream(callback)
+}
+
+BufferListStream.prototype._write = function _write (buf, encoding, callback) {
+  this._appendBuffer(buf)
+
+  if (typeof callback === 'function') {
+    callback()
+  }
+}
+
+BufferListStream.prototype._read = function _read (size) {
+  if (!this.length) {
+    return this.push(null)
+  }
+
+  size = Math.min(size, this.length)
+  this.push(this.slice(0, size))
+  this.consume(size)
+}
+
+BufferListStream.prototype.end = function end (chunk) {
+  DuplexStream.prototype.end.call(this, chunk)
+
+  if (this._callback) {
+    this._callback(null, this.slice())
+    this._callback = null
+  }
+}
+
+BufferListStream.prototype._destroy = function _destroy (err, cb) {
+  this._bufs.length = 0
+  this.length = 0
+  cb(err)
+}
+
+BufferListStream.prototype._isBufferList = function _isBufferList (b) {
+  return b instanceof BufferListStream || b instanceof BufferList || BufferListStream.isBufferList(b)
+}
+
+BufferListStream.isBufferList = BufferList.isBufferList
+
+module.exports = BufferListStream
+module.exports.BufferListStream = BufferListStream
+module.exports.BufferList = BufferList