refactor(vue): 构建ref简单数据类型的响应性

packages/vue/examples/reactivity/ref.html

@@ -9,16 +9,15 @@
 <div id="app"></div>
 </body>
 <script>
-    const { reactive,effect } = Vue
-    const obj=reactive({
+    const { ref,effect } = Vue
+    const obj=ref({
         name:'张三'
     })
-
     effect(()=>{
-        document.querySelector('#app').innerText=name
+        document.querySelector('#app').innerText=obj.value.name
     })
     setTimeout(()=>{
-        obj.name='李四'
+        obj.value.name='李四'
     },2000)
 </script>
 </html>