fix: 修复msg组件英文词间断行、picker组件适配darkmode、toast组件的旧版loading图标大小问题

feat: 新增圆圈loading组件、升级toast组件UI、升级button组件的loading UI、修复msg组件文本区域英文单词…

…词间折行问题

feat: WeUI v2.4.0

Merge pull request Tencent#855 from Tencent/develop

feat: WeUI v2.4.0 升级darkmode色板

Merge pull request Tencent#838 from Tencent/develop

### v2.3.0 (2020-03-04)

#### Features
* feat: input的placeholder更改颜色
* feat: 更改cell的点击态背景颜色

#### Bugfixes
* fix: msg的title没有适配黑暗模式
* fix: input placeholder的样式
* fix: fix default 按钮的点击态
* fix: form表单的验证码样式
* fix: darkmode右滑组件、修复图片预览组件刘海屏安全间距问题
* fix: 搜索框的文本没有适配黑暗模式

2.2.0

Merge pull request Tencent#833 from uxsi/fixbug_0116

v2.1.4

Merge pull request Tencent#808 from uxsi/develop

new feature

Merge pull request Tencent#793 from uxsi/dialog

v2.0.1