message: [changelog] 2.0.0-beta.3
diff: # Changelog
  +### [v2.0.0-beta.3](https://github.com/youzan/vant/tree/v2.0.0-beta.3)
  +`2019-05-31`
  +
  +##### Field
  +
  +- No longer update v-model during IME composition
  +
  +##### IndexBar
  +
  +- Add `sticky` prop
  +- Add `highlight-color` prop
  +
  +##### Notify
  +
  +- Add `onClose` option
  +- Add `onOpened` option
  +
  +##### Picker
  +
  +- Optimize animation
  +
  +##### Rate
  +
  +- Add `gutter` prop
  +- Support `size` prop of `String` type
  +
  +##### Search
  +
  +- No longer update v-model during IME composition
  +
  +##### SwipeCell
  +
  +- Support auto calc `left-width` and `right-width`
  +
  +##### Toast
  +
  +- Add `onOpened` option
  +
  +
  ### [v2.0.0-beta.2](https://github.com/youzan/vant/tree/v2.0.0-beta.2)
  #### Accessibility
  