在 VSCode 中运行 Vue 关于作用域插槽时的问题，报出警告：
Module Warning (from ./node_modules/@vue/vue-loader-v15/lib/loaders/templateLoader.js):
(Emitted value instead of an instance of Error) the "scope" attribute for scoped slots have been deprecated and replaced by "slot-scope" since 2.5. The new "slot-scope" attribute can also be used on plain elements in addition to <template> to denote scoped slots.
项目能正常运行，只是报出警告，原因是此时的 Vue 版本（自从 2.5 后）不支持 <template> 的 scope属性，要改成 slot-scope，正确代码见下图：
