message: Add missing CHANGELOG.md entries of v2.0.0-alpha.13
diff: @@ -121,6 +121,9 @@ for the list of changes made since `v2.0.0-alpha.1`.
  - pt-BR locale [is updated for v2 format](https://github.com/date-fns/date-fns/pull/807).
  Thanks to [@YagoCarballo](https://github.com/YagoCarballo) again!
  +- nl locale [is updated for v2 format](https://github.com/date-fns/date-fns/pull/811).
  + Thanks to the teamwork of [@curry684](https://github.com/curry684) and [@stefanvermaas](https://github.com/stefanvermaas)!
  +
  - New locale-dependent week-numbering year helpers:
  - `getWeek`
  