Merge branch 'release/2.12.0'

* release/2.12.0:
  Bump version.
Bump version.
Upgrade to 2.13.1.
Bump version.
Merge branch 'release/2.13.1' into production

* release/2.13.1:
  Bump version.
  Upgrade to 2.13.1.
  Bump version.