message: [changelog] 2.1.0-beta.1
diff: # Changelog
  +### [v2.1.0-beta.1](https://github.com/youzan/vant/tree/v2.1.0-beta.1)
  +`2019-07-25`
  +
  +**Improvements**
  +
  +- SwipeCell: add stop-propagation prop [\#3952](https://github.com/youzan/vant/pull/3952)
  +- Sku: update button style [\#3922](https://github.com/youzan/vant/pull/3922)
  +- Sku: add sku-header-origin-price slot [\#3958](https://github.com/youzan/vant/pull/3958)
  +- CouponList: add empty-image prop [\#3941](https://github.com/youzan/vant/pull/3941)
  +- AddressList: add click-item event [\#3942](https://github.com/youzan/vant/pull/3942)
  +
  +**Bug Fixes**
  +
  +- fix Tabs fix scroll position deviation when sticky [\#3949](https://github.com/youzan/vant/pull/3949)
  +- fix IndexBar should update when index-list updated [\#3943](https://github.com/youzan/vant/pull/3943)
  +
  +
  +### [v2.1.0-beta.0](https://github.com/youzan/vant/tree/v2.1.0-beta.0)
  +`2019-07-22`
  +
  +**Improvements**
  +
  +- Sku: update style [\#3875](https://github.com/youzan/vant/pull/3875)
  +- Sku: add price-tag prop [\#3875](https://github.com/youzan/vant/pull/3875)
  +- Sku: add hide-selected-text prop [\#3875](https://github.com/youzan/vant/pull/3875)
  +- Dialog: centered in screen [\#3905](https://github.com/youzan/vant/pull/3905)
  +- Uploader: add less vars [\#3907](https://github.com/youzan/vant/pull/3907)
  +- ActionSheet: add less vars [\#3908](https://github.com/youzan/vant/pull/3908)
  +
  +**Bug Fixes**
  +
  +- fix AddressList can't select item when click empty area [\#3909](https://github.com/youzan/vant/pull/3909)
  +
  +
  ### [v2.0.9](https://github.com/youzan/vant/tree/v2.0.9)
  `2019-07-19`
  