Add node-webkit to UMD header

Author: felixhammerl

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tcp-socket",
-  "version": "0.5.7",
+  "version": "0.5.8",
   "main": "src/tcp-socket",
   "description": "This shim brings the W3C Raw Socket API to node.js and Chromium. Its purpose is to enable apps to use the same api in Firefox OS, Chrome OS, and on the server.",
   "repository": {

src/tcp-socket.js

@@ -25,7 +25,7 @@
         // amd
         define(['tcp-socket-tls'], factory.bind(null, navigator));
     } else if (typeof exports === 'object' && typeof navigator !== 'undefined') {
-        if (process.versions.electron) {
+        if (process.versions.electron || process.versions.nw || process.versions['node-webkit']) {
             // common.js for electron
             module.exports = factory(navigator, null, require('net'), require('tls'));
         } else {