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diff --git a/node_modules/rollup-plugin-node-polyfills/polyfills/zlib.js b/node_modules/rollup-plugin-node-polyfills/polyfills/zlib.js
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+// 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.
+
+import {Transform} from 'stream';
+import * as _binding from './zlib-lib/binding';
+import {inherits} from 'util';
+function assert (a, msg) {
+ if (!a) {
+ throw new Error(msg);
+ }
+}
+var binding = {};
+Object.keys(_binding).forEach(function (key) {
+ binding[key] = _binding[key];
+});
+// zlib doesn't provide these, so kludge them in following the same
+// const naming scheme zlib uses.
+binding.Z_MIN_WINDOWBITS = 8;
+binding.Z_MAX_WINDOWBITS = 15;
+binding.Z_DEFAULT_WINDOWBITS = 15;
+
+// fewer than 64 bytes per chunk is stupid.
+// technically it could work with as few as 8, but even 64 bytes
+// is absurdly low. Usually a MB or more is best.
+binding.Z_MIN_CHUNK = 64;
+binding.Z_MAX_CHUNK = Infinity;
+binding.Z_DEFAULT_CHUNK = (16 * 1024);
+
+binding.Z_MIN_MEMLEVEL = 1;
+binding.Z_MAX_MEMLEVEL = 9;
+binding.Z_DEFAULT_MEMLEVEL = 8;
+
+binding.Z_MIN_LEVEL = -1;
+binding.Z_MAX_LEVEL = 9;
+binding.Z_DEFAULT_LEVEL = binding.Z_DEFAULT_COMPRESSION;
+
+
+// translation table for return codes.
+export var codes = {
+ Z_OK: binding.Z_OK,
+ Z_STREAM_END: binding.Z_STREAM_END,
+ Z_NEED_DICT: binding.Z_NEED_DICT,
+ Z_ERRNO: binding.Z_ERRNO,
+ Z_STREAM_ERROR: binding.Z_STREAM_ERROR,
+ Z_DATA_ERROR: binding.Z_DATA_ERROR,
+ Z_MEM_ERROR: binding.Z_MEM_ERROR,
+ Z_BUF_ERROR: binding.Z_BUF_ERROR,
+ Z_VERSION_ERROR: binding.Z_VERSION_ERROR
+};
+
+Object.keys(codes).forEach(function(k) {
+ codes[codes[k]] = k;
+});
+
+export function createDeflate(o) {
+ return new Deflate(o);
+}
+
+export function createInflate(o) {
+ return new Inflate(o);
+}
+
+export function createDeflateRaw(o) {
+ return new DeflateRaw(o);
+}
+
+export function createInflateRaw(o) {
+ return new InflateRaw(o);
+}
+
+export function createGzip(o) {
+ return new Gzip(o);
+}
+
+export function createGunzip(o) {
+ return new Gunzip(o);
+}
+
+export function createUnzip(o) {
+ return new Unzip(o);
+}
+
+
+// Convenience methods.
+// compress/decompress a string or buffer in one step.
+export function deflate(buffer, opts, callback) {
+ if (typeof opts === 'function') {
+ callback = opts;
+ opts = {};
+ }
+ return zlibBuffer(new Deflate(opts), buffer, callback);
+}
+
+export function deflateSync(buffer, opts) {
+ return zlibBufferSync(new Deflate(opts), buffer);
+}
+
+export function gzip(buffer, opts, callback) {
+ if (typeof opts === 'function') {
+ callback = opts;
+ opts = {};
+ }
+ return zlibBuffer(new Gzip(opts), buffer, callback);
+}
+
+export function gzipSync(buffer, opts) {
+ return zlibBufferSync(new Gzip(opts), buffer);
+}
+
+export function deflateRaw(buffer, opts, callback) {
+ if (typeof opts === 'function') {
+ callback = opts;
+ opts = {};
+ }
+ return zlibBuffer(new DeflateRaw(opts), buffer, callback);
+}
+
+export function deflateRawSync(buffer, opts) {
+ return zlibBufferSync(new DeflateRaw(opts), buffer);
+}
+
+export function unzip(buffer, opts, callback) {
+ if (typeof opts === 'function') {
+ callback = opts;
+ opts = {};
+ }
+ return zlibBuffer(new Unzip(opts), buffer, callback);
+}
+
+export function unzipSync(buffer, opts) {
+ return zlibBufferSync(new Unzip(opts), buffer);
+}
+
+export function inflate(buffer, opts, callback) {
+ if (typeof opts === 'function') {
+ callback = opts;
+ opts = {};
+ }
+ return zlibBuffer(new Inflate(opts), buffer, callback);
+}
+
+export function inflateSync(buffer, opts) {
+ return zlibBufferSync(new Inflate(opts), buffer);
+}
+
+export function gunzip(buffer, opts, callback) {
+ if (typeof opts === 'function') {
+ callback = opts;
+ opts = {};
+ }
+ return zlibBuffer(new Gunzip(opts), buffer, callback);
+}
+
+export function gunzipSync(buffer, opts) {
+ return zlibBufferSync(new Gunzip(opts), buffer);
+}
+
+export function inflateRaw(buffer, opts, callback) {
+ if (typeof opts === 'function') {
+ callback = opts;
+ opts = {};
+ }
+ return zlibBuffer(new InflateRaw(opts), buffer, callback);
+}
+
+export function inflateRawSync(buffer, opts) {
+ return zlibBufferSync(new InflateRaw(opts), buffer);
+}
+
+function zlibBuffer(engine, buffer, callback) {
+ var buffers = [];
+ var nread = 0;
+
+ engine.on('error', onError);
+ engine.on('end', onEnd);
+
+ engine.end(buffer);
+ flow();
+
+ function flow() {
+ var chunk;
+ while (null !== (chunk = engine.read())) {
+ buffers.push(chunk);
+ nread += chunk.length;
+ }
+ engine.once('readable', flow);
+ }
+
+ function onError(err) {
+ engine.removeListener('end', onEnd);
+ engine.removeListener('readable', flow);
+ callback(err);
+ }
+
+ function onEnd() {
+ var buf = Buffer.concat(buffers, nread);
+ buffers = [];
+ callback(null, buf);
+ engine.close();
+ }
+}
+
+function zlibBufferSync(engine, buffer) {
+ if (typeof buffer === 'string')
+ buffer = new Buffer(buffer);
+ if (!Buffer.isBuffer(buffer))
+ throw new TypeError('Not a string or buffer');
+
+ var flushFlag = binding.Z_FINISH;
+
+ return engine._processChunk(buffer, flushFlag);
+}
+
+// generic zlib
+// minimal 2-byte header
+export function Deflate(opts) {
+ if (!(this instanceof Deflate)) return new Deflate(opts);
+ Zlib.call(this, opts, binding.DEFLATE);
+}
+
+export function Inflate(opts) {
+ if (!(this instanceof Inflate)) return new Inflate(opts);
+ Zlib.call(this, opts, binding.INFLATE);
+}
+
+
+
+// gzip - bigger header, same deflate compression
+export function Gzip(opts) {
+ if (!(this instanceof Gzip)) return new Gzip(opts);
+ Zlib.call(this, opts, binding.GZIP);
+}
+
+export function Gunzip(opts) {
+ if (!(this instanceof Gunzip)) return new Gunzip(opts);
+ Zlib.call(this, opts, binding.GUNZIP);
+}
+
+
+
+// raw - no header
+export function DeflateRaw(opts) {
+ if (!(this instanceof DeflateRaw)) return new DeflateRaw(opts);
+ Zlib.call(this, opts, binding.DEFLATERAW);
+}
+
+export function InflateRaw(opts) {
+ if (!(this instanceof InflateRaw)) return new InflateRaw(opts);
+ Zlib.call(this, opts, binding.INFLATERAW);
+}
+
+
+// auto-detect header.
+export function Unzip(opts) {
+ if (!(this instanceof Unzip)) return new Unzip(opts);
+ Zlib.call(this, opts, binding.UNZIP);
+}
+
+
+// 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.
+
+export function Zlib(opts, mode) {
+ this._opts = opts = opts || {};
+ this._chunkSize = opts.chunkSize || binding.Z_DEFAULT_CHUNK;
+
+ Transform.call(this, opts);
+
+ if (opts.flush) {
+ if (opts.flush !== binding.Z_NO_FLUSH &&
+ opts.flush !== binding.Z_PARTIAL_FLUSH &&
+ opts.flush !== binding.Z_SYNC_FLUSH &&
+ opts.flush !== binding.Z_FULL_FLUSH &&
+ opts.flush !== binding.Z_FINISH &&
+ opts.flush !== binding.Z_BLOCK) {
+ throw new Error('Invalid flush flag: ' + opts.flush);
+ }
+ }
+ this._flushFlag = opts.flush || binding.Z_NO_FLUSH;
+
+ if (opts.chunkSize) {
+ if (opts.chunkSize < binding.Z_MIN_CHUNK ||
+ opts.chunkSize > binding.Z_MAX_CHUNK) {
+ throw new Error('Invalid chunk size: ' + opts.chunkSize);
+ }
+ }
+
+ if (opts.windowBits) {
+ if (opts.windowBits < binding.Z_MIN_WINDOWBITS ||
+ opts.windowBits > binding.Z_MAX_WINDOWBITS) {
+ throw new Error('Invalid windowBits: ' + opts.windowBits);
+ }
+ }
+
+ if (opts.level) {
+ if (opts.level < binding.Z_MIN_LEVEL ||
+ opts.level > binding.Z_MAX_LEVEL) {
+ throw new Error('Invalid compression level: ' + opts.level);
+ }
+ }
+
+ if (opts.memLevel) {
+ if (opts.memLevel < binding.Z_MIN_MEMLEVEL ||
+ opts.memLevel > binding.Z_MAX_MEMLEVEL) {
+ throw new Error('Invalid memLevel: ' + opts.memLevel);
+ }
+ }
+
+ if (opts.strategy) {
+ if (opts.strategy != binding.Z_FILTERED &&
+ opts.strategy != binding.Z_HUFFMAN_ONLY &&
+ opts.strategy != binding.Z_RLE &&
+ opts.strategy != binding.Z_FIXED &&
+ opts.strategy != binding.Z_DEFAULT_STRATEGY) {
+ throw new Error('Invalid strategy: ' + opts.strategy);
+ }
+ }
+
+ if (opts.dictionary) {
+ if (!Buffer.isBuffer(opts.dictionary)) {
+ throw new Error('Invalid dictionary: it should be a Buffer instance');
+ }
+ }
+
+ this._binding = new binding.Zlib(mode);
+
+ var self = this;
+ this._hadError = false;
+ this._binding.onerror = function(message, errno) {
+ // there is no way to cleanly recover.
+ // continuing only obscures problems.
+ self._binding = null;
+ self._hadError = true;
+
+ var error = new Error(message);
+ error.errno = errno;
+ error.code = binding.codes[errno];
+ self.emit('error', error);
+ };
+
+ var level = binding.Z_DEFAULT_COMPRESSION;
+ if (typeof opts.level === 'number') level = opts.level;
+
+ var strategy = binding.Z_DEFAULT_STRATEGY;
+ if (typeof opts.strategy === 'number') strategy = opts.strategy;
+
+ this._binding.init(opts.windowBits || binding.Z_DEFAULT_WINDOWBITS,
+ level,
+ opts.memLevel || binding.Z_DEFAULT_MEMLEVEL,
+ strategy,
+ opts.dictionary);
+
+ this._buffer = new Buffer(this._chunkSize);
+ this._offset = 0;
+ this._closed = false;
+ this._level = level;
+ this._strategy = strategy;
+
+ this.once('end', this.close);
+}
+
+inherits(Zlib, Transform);
+
+Zlib.prototype.params = function(level, strategy, callback) {
+ if (level < binding.Z_MIN_LEVEL ||
+ level > binding.Z_MAX_LEVEL) {
+ throw new RangeError('Invalid compression level: ' + level);
+ }
+ if (strategy != binding.Z_FILTERED &&
+ strategy != binding.Z_HUFFMAN_ONLY &&
+ strategy != binding.Z_RLE &&
+ strategy != binding.Z_FIXED &&
+ strategy != binding.Z_DEFAULT_STRATEGY) {
+ throw new TypeError('Invalid strategy: ' + strategy);
+ }
+
+ if (this._level !== level || this._strategy !== strategy) {
+ var self = this;
+ this.flush(binding.Z_SYNC_FLUSH, function() {
+ self._binding.params(level, strategy);
+ if (!self._hadError) {
+ self._level = level;
+ self._strategy = strategy;
+ if (callback) callback();
+ }
+ });
+ } else {
+ process.nextTick(callback);
+ }
+};
+
+Zlib.prototype.reset = function() {
+ return this._binding.reset();
+};
+
+// This is the _flush function called by the transform class,
+// internally, when the last chunk has been written.
+Zlib.prototype._flush = function(callback) {
+ this._transform(new Buffer(0), '', callback);
+};
+
+Zlib.prototype.flush = function(kind, callback) {
+ var ws = this._writableState;
+
+ if (typeof kind === 'function' || (kind === void 0 && !callback)) {
+ callback = kind;
+ kind = binding.Z_FULL_FLUSH;
+ }
+
+ if (ws.ended) {
+ if (callback)
+ process.nextTick(callback);
+ } else if (ws.ending) {
+ if (callback)
+ this.once('end', callback);
+ } else if (ws.needDrain) {
+ var self = this;
+ this.once('drain', function() {
+ self.flush(callback);
+ });
+ } else {
+ this._flushFlag = kind;
+ this.write(new Buffer(0), '', callback);
+ }
+};
+
+Zlib.prototype.close = function(callback) {
+ if (callback)
+ process.nextTick(callback);
+
+ if (this._closed)
+ return;
+
+ this._closed = true;
+
+ this._binding.close();
+
+ var self = this;
+ process.nextTick(function() {
+ self.emit('close');
+ });
+};
+
+Zlib.prototype._transform = function(chunk, encoding, cb) {
+ var flushFlag;
+ var ws = this._writableState;
+ var ending = ws.ending || ws.ended;
+ var last = ending && (!chunk || ws.length === chunk.length);
+
+ if (!chunk === null && !Buffer.isBuffer(chunk))
+ return cb(new Error('invalid input'));
+
+ // If it's the last chunk, or a final flush, we use the Z_FINISH flush flag.
+ // If it's explicitly flushing at some other time, then we use
+ // Z_FULL_FLUSH. Otherwise, use Z_NO_FLUSH for maximum compression
+ // goodness.
+ if (last)
+ flushFlag = binding.Z_FINISH;
+ else {
+ flushFlag = this._flushFlag;
+ // once we've flushed the last of the queue, stop flushing and
+ // go back to the normal behavior.
+ if (chunk.length >= ws.length) {
+ this._flushFlag = this._opts.flush || binding.Z_NO_FLUSH;
+ }
+ }
+
+ this._processChunk(chunk, flushFlag, cb);
+};
+
+Zlib.prototype._processChunk = function(chunk, flushFlag, cb) {
+ var availInBefore = chunk && chunk.length;
+ var availOutBefore = this._chunkSize - this._offset;
+ var inOff = 0;
+
+ var self = this;
+
+ var async = typeof cb === 'function';
+
+ if (!async) {
+ var buffers = [];
+ var nread = 0;
+
+ var error;
+ this.on('error', function(er) {
+ error = er;
+ });
+
+ do {
+ var res = this._binding.writeSync(flushFlag,
+ chunk, // in
+ inOff, // in_off
+ availInBefore, // in_len
+ this._buffer, // out
+ this._offset, //out_off
+ availOutBefore); // out_len
+ } while (!this._hadError && callback(res[0], res[1]));
+
+ if (this._hadError) {
+ throw error;
+ }
+
+ var buf = Buffer.concat(buffers, nread);
+ this.close();
+
+ return buf;
+ }
+
+ var req = this._binding.write(flushFlag,
+ chunk, // in
+ inOff, // in_off
+ availInBefore, // in_len
+ this._buffer, // out
+ this._offset, //out_off
+ availOutBefore); // out_len
+
+ req.buffer = chunk;
+ req.callback = callback;
+
+ function callback(availInAfter, availOutAfter) {
+ if (self._hadError)
+ return;
+
+ var have = availOutBefore - availOutAfter;
+ assert(have >= 0, 'have should not go down');
+
+ if (have > 0) {
+ var out = self._buffer.slice(self._offset, self._offset + have);
+ self._offset += have;
+ // serve some output to the consumer.
+ if (async) {
+ self.push(out);
+ } else {
+ buffers.push(out);
+ nread += out.length;
+ }
+ }
+
+ // exhausted the output buffer, or used all the input create a new one.
+ if (availOutAfter === 0 || self._offset >= self._chunkSize) {
+ availOutBefore = self._chunkSize;
+ self._offset = 0;
+ self._buffer = new Buffer(self._chunkSize);
+ }
+
+ if (availOutAfter === 0) {
+ // Not actually done. Need to reprocess.
+ // Also, update the availInBefore to the availInAfter value,
+ // so that if we have to hit it a third (fourth, etc.) time,
+ // it'll have the correct byte counts.
+ inOff += (availInBefore - availInAfter);
+ availInBefore = availInAfter;
+
+ if (!async)
+ return true;
+
+ var newReq = self._binding.write(flushFlag,
+ chunk,
+ inOff,
+ availInBefore,
+ self._buffer,
+ self._offset,
+ self._chunkSize);
+ newReq.callback = callback; // this same function
+ newReq.buffer = chunk;
+ return;
+ }
+
+ if (!async)
+ return false;
+
+ // finished with the chunk.
+ cb();
+ }
+};
+
+inherits(Deflate, Zlib);
+inherits(Inflate, Zlib);
+inherits(Gzip, Zlib);
+inherits(Gunzip, Zlib);
+inherits(DeflateRaw, Zlib);
+inherits(InflateRaw, Zlib);
+inherits(Unzip, Zlib);
+export default {
+ codes: codes,
+ createDeflate: createDeflate,
+ createInflate: createInflate,
+ createDeflateRaw: createDeflateRaw,
+ createInflateRaw: createInflateRaw,
+ createGzip: createGzip,
+ createGunzip: createGunzip,
+ createUnzip: createUnzip,
+ deflate: deflate,
+ deflateSync: deflateSync,
+ gzip: gzip,
+ gzipSync: gzipSync,
+ deflateRaw: deflateRaw,
+ deflateRawSync: deflateRawSync,
+ unzip: unzip,
+ unzipSync: unzipSync,
+ inflate: inflate,
+ inflateSync: inflateSync,
+ gunzip: gunzip,
+ gunzipSync: gunzipSync,
+ inflateRaw: inflateRaw,
+ inflateRawSync: inflateRawSync,
+ Deflate: Deflate,
+ Inflate: Inflate,
+ Gzip: Gzip,
+ Gunzip: Gunzip,
+ DeflateRaw: DeflateRaw,
+ InflateRaw: InflateRaw,
+ Unzip: Unzip,
+ Zlib: Zlib
+};
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