Merge pull request #1579 from hrajotia/patch-1

setting environment to production

Author: AllenFang

webpack.umd.min.config.js

@@ -2,6 +2,9 @@
 var webpack = require('webpack');
 var umdConfig = require('./webpack.umd.config');
 
+// setting environment
+process.env.NODE_ENV = 'production';
+
 umdConfig.output.filename = '[name].min.js';
 umdConfig.devtool = null;
 umdConfig.plugins = [