message: docs(changelog): 2.2.2
diff: # Changelog
  +### [v2.2.2](https://github.com/youzan/vant/tree/v2.2.2)
  +`2019-09-19`
  +
  +**Features**
  +
  +- Dialog: improve word wrap [\#4506](https://github.com/youzan/vant/pull/4506)
  +- Search: add action-text prop [\#4501](https://github.com/youzan/vant/pull/4501)
  +- Popup: add close-icon-position prop [\#4507](https://github.com/youzan/vant/pull/4507)
  +- Uploader: add index param in events [\#4460](https://github.com/youzan/vant/pull/4460)
  +- GoodsActionButton: increase height [\#4461](https://github.com/youzan/vant/pull/4461)
  +- AddressList: add @address-list-item-radio-icon-color var [\#4481](https://github.com/youzan/vant/pull/4481)
  +
  +**Bug Fixes**
  +
  +- fix Field disabled color in safari [\#4508](https://github.com/youzan/vant/pull/4508)
  +- fix ImagePreview incorrect scale [\#4477](https://github.com/youzan/vant/pull/4477)
  +- fix DatetimePicker infinite loop when use formatted text is unnumeric [\#4485](https://github.com/youzan/vant/pull/4485)
  +
  +
  ### [v2.2.1](https://github.com/youzan/vant/tree/v2.2.1)
  `2019-09-12`
  