Update playground

Author: Demivan

playground/App.vue

@@ -1,12 +1,18 @@
 <template>
   <div>
     <hello-world name="Vue 2" @update="onUpdate" />
+
+    <async-component />
   </div>
 </template>
 
 <script setup lang="ts">
+import { defineAsyncComponent } from '@vue/composition-api'
+
 import HelloWorld from './HelloWorld.vue'
 
+const AsyncComponent = defineAsyncComponent(() => import('./Async.vue'))
+
 function onUpdate(e: any) {
   // eslint-disable-next-line no-console
   console.log(e)

playground/Async.vue

@@ -0,0 +1,3 @@
+<template>
+  <div>Async Component</div>
+</template>

test/__snapshots__/transform.test.ts.snap

@@ -30,6 +30,13 @@ export default __sfc_main;
 "
 `;
 
+exports[`transform fixtures playground/Async.vue 1`] = `
+"<template>
+  <div>Async Component</div>
+</template>
+"
+`;
+
 exports[`transform fixtures playground/Bar.vue 1`] = `
 "<template>
   <div>Bar</div>