message: Add changelog entry for v2.10.0
diff: @@ -8,7 +8,11 @@ This change log follows the format documented in [Keep a CHANGELOG].
  [semantic versioning]: http://semver.org/
  [keep a changelog]: http://keepachangelog.com/
  -## Unreleased
  +## [2.10.0] - 2020-02-25
  +
  +### Fixed
  +
  +- [Fixed `formatISO` when formatting time with timezones with minute offsets > 0](https://github.com/date-fns/date-fns/pull/1599).
  ### Added
  