Merge pull request #4606 from mpilquist/topic/bump-base-version-to-2.12

Bump base version to 2.12

Merge pull request #4604 from typelevel/update/munit-1.0.0

Update munit to 1.0.0

Merge pull request #4477 from mox692/fix/unnecessary_syntax_allocation

Fix unnecessary syntax allocation

Merge pull request #4311 from timo-schmid/doctests-optiont

Add more DocTests for `OptionT`

Merge pull request #4237 from armanbilge/topic/new-developers

Add new maintainers to developer list

Releasing 2.7.0

Releasing 2.6.1

Releasing 2.6.0

Releasing 2.5.0

Releasing 2.4.2