use bable stage2 fixed#59

Author: Plortinus

template/.babelrc

@@ -1,5 +1,6 @@
 {
   "presets": [
-    ["env", { "modules": false }]
+    ["env", { "modules": false }],
+    "stage-2"
   ]
 }

template/package.json

@@ -15,7 +15,7 @@
     "autoprefixer": "^8.2.0",
     "babel-core": "^6.25.0",
     "babel-loader": "^7.1.1",
-    "babel-preset-env": "^1.6.0",
+    "babel-preset-env": "^1.6.1",
     "css-hot-loader": "^1.3.0",
     "css-loader": "^0.28.4",
     "extract-text-webpack-plugin": "^4.0.0-beta.0",