message: fix(watch): avoid traversing objects that are marked non-reactive
diff: @@ -21,6 +21,7 @@ function _traverse(val: any, seen: SimpleSet) {
  const isA = isArray(val)
  if (
  (!isA && !isObject(val)) ||
  + val.__v_skip /* ReactiveFlags.SKIP */ ||
  Object.isFrozen(val) ||
  val instanceof VNode
  ) {
  