add version tag to config/index.js

Author: LinusBorg

template/config/index.js

@@ -1,5 +1,7 @@
-'use strict'
+'use stxrict'
+// Template version: 1.1.0
 // see http://vuejs-templates.github.io/webpack for documentation.
+
 const path = require('path')
 
 module.exports = {