message: docs(changelog): 2.4.1
diff: # Changelog
  +### [v2.4.1](https://github.com/youzan/vant/compare/v2.4.0...v2.4.1)
  +`2020-01-02`
  +
  +**Feature**
  +
  +* ContactEdit: show error message in field [#5437](https://github.com/youzan/vant/issues/5437)
  +* CouponCell: prefer to use value over denominations [#5438](https://github.com/youzan/vant/issues/5438)
  +
  +**Bug Fixes**
  +
  +* Calendar: fix incorrect day offset [#5452](https://github.com/youzan/vant/issues/5452)
  +* List: fix incorrect reaching edge condition when direction is up [#5439](https://github.com/youzan/vant/issues/5439)
  +
  +
  ### [v2.4.0](https://github.com/youzan/vant/compare/v2.3.3...v2.4.0)
  `2020-01-01`
  