Updated Babel presets.

Author: jmosawy

. babelrc

@@ -1,5 +1,5 @@
 {
   "presets": [
-    "env"
+    "es2015"
   ]
 }

package.json

@@ -5,7 +5,8 @@
   "private": true,
   "scripts": {
     "lint": "eslint .",
-    "dev": "node ./server/server.js"
+    "dev": "node ./server/server.js",
+    "build": "node ./server/build.js"
   },
   "repository": {
     "type": "git",
@@ -28,7 +29,7 @@
     "autoprefixer": "^6.7.7",
     "babel-core": "^6.24.1",
     "babel-loader": "^6.4.1",
-    "babel-preset-env": "^1.4.0",
+    "babel-preset-es2015": "^6.24.1",
     "browser-sync": "^2.18.8",
     "css-loader": "^0.28.0",
     "eslint": "^3.19.0",