use stage-2

.babelrc

 {
-  "presets": ["es2015-webpack"]
+  "presets": ["es2015-webpack", "stage-2"]
 }

package.json

@@ -23,6 +23,7 @@
     "babel-core": "^6.0.0",
     "babel-loader": "^6.0.0",
     "babel-preset-es2015-webpack": "^6.0.0",
+    "babel-preset-stage-2": "^6.11.0",
     "css-loader": "^0.23.1",
     "file-loader": "^0.8.4",
     "vue-loader": "^9.2.2",

src/App.vue

@@ -15,7 +15,6 @@
 
 <script>
 export default {
-  name: 'app',
   data () {
     return {
       msg: 'Hello Vue 2.0!'

src/app.js

@@ -3,10 +3,10 @@ import App from './App.vue'
 import router from './router'
 import store from './store'
 
-export { router, store }
-
-export const app = new Vue({
+const app = new Vue({
   router,
   store,
-  render: h => h(App)
+  ...App
 })
+
+export { app, router, store }