message: fix: useReactive
diff: @@ -14,7 +14,7 @@ function observer<T extends object>(initialVal: T, cb: () => void) {
  const proxy = new Proxy<T>(initialVal, {
  get(target, key, receiver) {
  const res = Reflect.get(target, key, receiver);
  - return typeof (res === 'object' && res !== null) ? observer(res, cb) : Reflect.get(target, key);
  + return (typeof res === 'object' && res !== null) ? observer(res, cb) : Reflect.get(target, key);
  },
  set(target, key, val) {
  const ret = Reflect.set(target, key, val);
  