[Fix] use punycode from the package and not from the node core module

Fixes #70

Author: ljharb

url.js

@@ -23,7 +23,7 @@
 
 'use strict';
 
-var punycode = require('punycode');
+var punycode = require('punycode/');
 
 function Url() {
   this.protocol = null;