message: link to changelog
  the changelog has more details than the upgrade guide on how to upgrade and would have been more useful if I could have found it sooner.
diff: ## Common changes
  +This page covers a few of the most common problems people face when updating from v1 to v2. For a more detailed list of changes, look at the [change log for version 2.0.0](https://date-fns.org/docs/Change-Log#2.0.0-2019-08-20).
  +
  ### Camel case naming schema
  Function submodules now use camelCase naming schema:
  