message: [changelog] 1.4.5
diff: ## Changelog
  +## [v1.4.5](https://github.com/youzan/vant/tree/v1.4.5)
  +`2018-11-23`
  +
  +**Improvements**
  +
  +- Tab: add animated props [\#2126](https://github.com/youzan/vant/pull/2126)
  +- Tab: update title style [\#2120](https://github.com/youzan/vant/pull/2120)
  +- Badge: update info style [\#2122](https://github.com/youzan/vant/pull/2122)
  +- Radio: add checked-color prop [\#2129](https://github.com/youzan/vant/pull/2129)
  +- Swipe: add indicator-color prop [\#2110](https://github.com/youzan/vant/pull/2110)
  +- TreeSelect: support disable option [\#2107](https://github.com/youzan/vant/pull/2107)
  +
  +**Bug Fixes**
  +
  +- fix Tab swipe-threshold not work when less than 4 [\#2128](https://github.com/youzan/vant/pull/2128)
  +
  +
  ## [v1.4.4](https://github.com/youzan/vant/tree/v1.4.4)
  `2018-11-18`
  