[Vuejs]-How to modify the demo of vue.js 1.0 to apply to vue.js 2.0?

Two breaking changes exist for v2.

1. v-for
   https://v2.vuejs.org/v2/guide/migration.html#v-for-Argument-Order-for-Arrays-changed

2. vm.$set
   https://v2.vuejs.org/v2/guide/migration.html#vm-set-changed

Fixed: https://jsfiddle.net/0qudfr48/9/

v-for="(item, index) in items"
...
Vue.set(vm, 'items', mysqlData.map((item) => {
...