message: docs(changelog): 3.0.0-rc.4
diff: @@ -16,6 +16,26 @@ Vant follows [Semantic Versioning 2.0.0](https://semver.org/lang/zh-CN/).
  ## Details
  +### [v3.0.0-rc.4](https://github.com/youzan/vant/compare/v2.12.0-beta.0...v3.0.0-rc.4)
  +
  +`2020-12-21`
  +
  +**New Component**
  +
  +- add Cascader component [#7771](https://github.com/youzan/vant/pull/7771)
  +
  +<img src="https://b.yzcdn.cn/vant/cascader_1221.png">
  +
  +**Feature**
  +
  +- Stepper: add show-input prop [#7785](https://github.com/youzan/vant/issues/7785)
  +- uploader: add single uploader preview image style [#7731](https://github.com/youzan/vant/issues/7731)
  +
  +**Types**
  +
  +- Lazyload: fix typing [#7757](https://github.com/youzan/vant/issues/7757)
  +- Contains all features and bug fixes of `v2.12.0-beta.0` version
  +
  ### [v3.0.0-rc.3](https://github.com/youzan/vant/compare/v2.11.2...v3.0.0-rc.3)
  `2020-12-10`
  @@ -32,6 +52,7 @@ Vant follows [Semantic Versioning 2.0.0](https://semver.org/lang/zh-CN/).
  - Stepper: disabled not work [c27760](https://github.com/youzan/vant/commit/c277603160a7a17685dc532304b9a0c2444db959)
  - Tabs: failed to set active tab [#7717](https://github.com/youzan/vant/issues/7717)
  +- Contains all features and bug fixes of `v2.11.3` version
  ### [v3.0.0-rc.2](https://github.com/youzan/vant/compare/v3.0.0-rc.1...v3.0.0-rc.2)
  @@ -47,6 +68,7 @@ Vant follows [Semantic Versioning 2.0.0](https://semver.org/lang/zh-CN/).
  - NumberKeyboard: fix hide-on-click-outside prop not working [#7668](https://github.com/youzan/vant/issues/7668) [#7667](https://github.com/youzan/vant/issues/7667)
  - Uploader: fix change status is not valid [#7681](https://github.com/youzan/vant/issues/7681)
  - Types: fix teleport typing [#7687](https://github.com/youzan/vant/issues/7687)
  +- Contains all features and bug fixes of `v2.11.2` version
  ### [v3.0.0-rc.1](https://github.com/youzan/vant/compare/v2.11.1...v3.0.0-rc.1)
  