This is the tenth major release in the Cats Effect 2.x lineage. It is fully binary compatible with all 2.x.y releases, and forward compatible with everything in the 2.3.x line. Please note that this supersedes 2.3.2, which was published in error.
The Scala 3 release train continues onward! The primary new feature in this release is simply a cross-publication for Scala 3.0.0-RC1. Support for 3.0.0-M2 has been dropped.
Special Note
With Cats Effect 3.0.0 just around the corner, we are continuing to wind down active development on Cats Effect 2.x. Despite this, we will be continuing to support and, when necessary, backport and maintain the 2.x branch for a largely indefinite period of time (likely 1-2 years from the release of 3.0.0). Security fixes and bug fixes will be addressed with the same priority as on the 3.x release, though new feature development will be entirely focused on the newer lineage.
Along those lines, there are no user-facing pull requests in between 2.3.1 and 2.3.3.