Make Browserify bundle work in ES3 environments

Author: ericf

index.js

@@ -1,4 +1,4 @@
 'use strict';
 
-exports = module.exports = require('./lib/parser').default;
-Object.defineProperty(exports, 'default', {value: exports});
+exports = module.exports = require('./lib/parser')['default'];
+exports['default'] = exports;