fix problem when using webpack (#83)

* fix problem when using webpack

Fixed issue #82

* Update angular-websocket.js

Author: Head

dist/angular-websocket.js

@@ -33,7 +33,7 @@
 
   var Socket;
 
-  if ((typeof exports === 'undefined' ? 'undefined' : _typeof(exports)) === 'object' && typeof require === 'function') {
+  if (typeof window === 'undefined') {
     try {
 
       Socket = ws.Client || ws.client || ws;
@@ -412,4 +412,4 @@
 
   exports.default = _angular2.default.module('ngWebSocket');
   module.exports = exports['default'];
-});
+});

src/angular-websocket.js

@@ -2,7 +2,7 @@ import angular from 'angular';
 
 var Socket;
 
-if (typeof exports === 'object' && typeof require === 'function') {
+if (typeof window === 'undefined') {
   try {
     var ws = require('ws');