message: [changelog] 0.10.3
diff: ## Changelog
  +### [0.10.3](https://github.com/youzan/vant/tree/v0.10.3)
  +`2017-10-25`
  +
  +**Improvements**
  +- add Tabbar info prop [\#245](https://github.com/youzan/vant/pull/245) [@chenjiahan](https://github.com/chenjiahan)
  +- add Toast position prop [\#244](https://github.com/youzan/vant/pull/244) [@chenjiahan](https://github.com/chenjiahan)
  +- add Coupon showExchangeBar prop [\#243](https://github.com/youzan/vant/pull/243) [@chenjiahan](https://github.com/chenjiahan)
  +- add Advanced components english document [\#236](https://github.com/youzan/vant/pull/236) [@Tinysymphony](https://github.com/Tinysymphony)
  +- add demo pages in document [\#237](https://github.com/youzan/vant/pull/237) [@chenjiahan](https://github.com/chenjiahan)
  +
  +**Bug Fixes**
  +- fix Address & Contact list style error [\#230](https://github.com/youzan/vant/pull/230) [@chenjiahan](https://github.com/chenjiahan)
  +- fix popup style missing when build style entry [\#231](https://github.com/youzan/vant/pull/231) [@chenjiahan](https://github.com/chenjiahan)
  +- fix PullRefresh touchcancel event [\#239](https://github.com/youzan/vant/pull/239) [@GeoffZhu](https://github.com/GeoffZhu)
  +
  ### [0.10.2](https://github.com/youzan/vant/tree/v0.10.2)
  `2017-10-20`
  **Improvements**
  -
  - Sku: sku-group slot add event bus [\#226](https://github.com/youzan/vant/pull/226) [@w91](https://github.com/w91)
  - add English documents [\#220](https://github.com/youzan/vant/pull/220) [@chenjiahan](https://github.com/chenjiahan)
  **Bug Fixes**
  -
  - Optimize component dependency analyze when build style entry [\#224](https://github.com/youzan/vant/pull/224) [@chenjiahan](https://github.com/chenjiahan)
  ### [0.10.1](https://github.com/youzan/vant/tree/v0.10.1)
  