**Improvements**

- Field: add size prop [\#2936](https://github.com/youzan/vant/pull/2936)

- Collapse: add size prop [\#2946](https://github.com/youzan/vant/pull/2946)

- Collapse: add border prop [\#2933](https://github.com/youzan/vant/pull/2933)

- CellGroup: add title prop [\#2928](https://github.com/youzan/vant/pull/2928)

- Steps: add active-icon prop [\#2934](https://github.com/youzan/vant/pull/2934)

- Picker: add default-index prop [\#2935](https://github.com/youzan/vant/pull/2935)

- Actionsheet: add index param for select event [\#2917](https://github.com/youzan/vant/pull/2917)

**Bug Fixes**

- fix Card origin-price slot not work [\#2927](https://github.com/youzan/vant/pull/2927)

- fix Swipe emit change event in correct time [\#2909](https://github.com/youzan/vant/pull/2909)

**Improvements**

- Field: 新增 size 属性 [\#2936](https://github.com/youzan/vant/pull/2936)

- Collapse: 新增 size 属性 [\#2946](https://github.com/youzan/vant/pull/2946)

- Collapse: 新增 border 属性 [\#2933](https://github.com/youzan/vant/pull/2933)

- CellGroup: 新增 title 属性 [\#2928](https://github.com/youzan/vant/pull/2928)

- Steps: 新增 active-icon 属性 [\#2934](https://github.com/youzan/vant/pull/2934)

- Picker: 新增 default-index 属性 [\#2935](https://github.com/youzan/vant/pull/2935)

- Actionsheet: 新增 index 作为 select 事件的回调参数 [\#2917](https://github.com/youzan/vant/pull/2917)

**Bug Fixes**

- 修复 Card origin-price 插槽未生效的问题 [\#2927](https://github.com/youzan/vant/pull/2927)

- 修复 Swipe change 事件触发时机错误的问题 [\#2909](https://github.com/youzan/vant/pull/2909)