Adds prepare command

Author: banhathome

package.json

@@ -5,6 +5,7 @@
   "main": "dist/main.js",
   "scripts": {
     "build": "webpack",
+    "prepare": "webpack",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "author": "banhathome <chris@chrisbanh.com>",