把render函数转化成下面那种。报错了：
VM1060:37 [Vue warn]: You are using the runtime-only build of Vue where the template compiler is not available. Either pre-compile the templates into render functions, or use the compiler-included build.
下面的方法。是不是写错了？
// new Vue({
// render: h => h(App),
// }).$mount('#app')
new Vue({
el: '#app',
store,//实例化
template: '<App/>',
components: { App }
})
