message: docs(changelog): 2.5.9
diff: # Changelog
  -### [v2.5.9-beta.0](https://github.com/youzan/vant/compare/v2.5.8...v2.5.9-beta.0)
  +### [v2.5.9](https://github.com/youzan/vant/compare/v2.5.8...v2.5.9)
  -`2020-03-28`
  +`2020-03-31`
  **Feature**
  - NumberKeyboard: show-delete-key prop not work [#5935](https://github.com/youzan/vant/issues/5935)
  - Toast: incorrect height in legacy devices [#5931](https://github.com/youzan/vant/issues/5931)
  +- Sticky: Fixed error when accessing the window during SSR [#5958](https://github.com/youzan/vant/issues/5958)
  ### [v2.5.8](https://github.com/youzan/vant/compare/v2.5.7...v2.5.8)
  