fix accessCache proto

[LongTengDao]

fix problems

Vue.createApp({
  template: `<div>{{ hasOwnProperty }}</div>`,
  data () {
    return {
      hasOwnProperty: 3,
    };
  },
}).mount('body');

production mode: Can't find prop hasOwnProperty on instance.ctx while renderring, which should on instance.data in fact, but skipped by switch(n) check. See PublicInstanceProxyHandlers.get.

---

development mode: Seems right on UI, but in fact, it's readed from instance.ctx copy, not instance.data, so when the prop value is Vue.ref(3), there will be { "_rawValue": 3, "_shallow": false, "__v_isRef": true, "_value": 3 } but not 3 on the UI.

Vue.createApp({
  template: `<div>{{ hasOwnProperty }}</div>`,
  data () {
    return {
      hasOwnProperty: Vue.ref(3),
    };
  },
}).mount('body');