message: docs: add breaking change not about parent
diff: </router-view>
  ```
  See more on the [KeepAlive](https://github.com/vuejs/vue-router-next/blob/master/e2e/keep-alive/index.ts) and the [Transition](https://github.com/vuejs/vue-router-next/blob/master/e2e/transitions/index.ts) examples.
  +- `parent` is removed from Route locations (`this.$route` and object returned by `router.resolve`). You can still access it via the `matched` array:
  + ```js
  + const parent = this.$route.matched[this.$route.matched.length -1]
  + ```
  ### Typings
  