chore: enable ts in template for example

Author: yyx990803

Diff for: example/TypeScript.vue

@@ -4,5 +4,5 @@ const a: Ref<number> = ref(12)
 </script>
 
 <template>
-  <p @click="a++">From TSssss: {{ a.toFixed(2) }}</p>
+  <p @click="a++">From TSssss: {{ a?.toFixed(2) }}</p>
 </template>

Diff for: example/webpack.config.js

@@ -55,7 +55,7 @@ module.exports = (env = {}) => {
             loader: 'vue-loader',
             options: {
               refSugar: true,
-              enableTsInTemplate: false,
+              // enableTsInTemplate: false,
             },
           },
           {