message: [changelog] 0.11.4
diff: ## Changelog
  +### [0.11.4](https://github.com/youzan/vant/tree/v0.11.4)
  +`2017-11-30`
  +
  +**Improvements**
  +- add type definition files [\#361](https://github.com/youzan/vant/pull/361) [@chenjiahan](https://github.com/chenjiahan)
  +- support use this.$toast/$dialog to call Toast/Dialog [\#363](https://github.com/youzan/vant/pull/363) [@chenjiahan](https://github.com/chenjiahan)
  +
  ### [0.11.3](https://github.com/youzan/vant/tree/v0.11.3)
  `2017-11-28`
  