message: Add changelog for v2.20.3
diff: @@ -8,6 +8,14 @@ This change log follows the format documented in [Keep a CHANGELOG].
  [semantic versioning]: http://semver.org/
  [keep a changelog]: http://keepachangelog.com/
  +## v2.20.3 - 2021-04-13
  +
  +Kudos to [fturmel](http://github.com/fturmel) for working on the release.
  +
  +### Fixed
  +
  +- [Fixed broken tree-shaking caused by missing links to corresponding ESM.](https://github.com/date-fns/date-fns/pull/2339) ([#2207](https://github.com/date-fns/date-fns/issues/2207))
  +
  ## v2.20.2 - 2021-04-12
  Kudos to [Maxim Topciu](http://github.com/maximtop) for working on the release.
  