Fix data function in stubs.

Author: zachleigh

src/Stubs/Component.vue

@@ -8,7 +8,7 @@
 
         mixins: [],
 
-        data: function () {
+        data () {
             return {
                 //
             }

src/Stubs/Mixin.js

@@ -1,7 +1,7 @@
 export default {
     components: {},
 
-    data: function () {
+    data () {
         return {
             //
         }
@@ -26,4 +26,4 @@ export default {
     methods: {
         //
     }
-};
+};