Cats v2.11.0 is a binary-compatible release in the 2.x series. It is published for Scala 2.12, 2.13, and 3.3+ with Scala.js 1.13+ and Scala Native 0.4.

What's Changed

Features

• Add OptionT#unlessM by @m50d in #4519
• Add mapOrKeep to Functor by @jozic in #4582
• Expose FunctionK.liftFunction as a part of the Scala 3 API by @pomadchin in #4600
• FunctionKLift cross compiled liftFunction suite by @pomadchin in #4603

Optimizations

• Replaces other Applicative.pure(()) with .unit by @satorg in #4558
• Use Applicative#unit in Foldable#traverse_ by @valencik in #4557
• Optimize traverse by @TimWSpence in #4498

Fixes

• Fix EitherT Bifunctor priority, add Bifoldable instance by @joroKr21 in #4576
• fix ambiguous ContravariantShow[SortedSet[A]] (& SortedMap) by @chwthewke in #4575
• Reduce visibility of value member in the NonEmptyMap syntax by @TonioGela in #4559

Documentation

• Fix link to Fetch by @mainali123 in #4522
• update book's link to second edition by @naferx in #4524
• fix wording at end of Semigroup doc by @vreuter in #4551
• Fix choice alias render in docs by @Masynchin in #4580
• fix typo by @Ghurtchu in #4583
• Use syntax in Functor's doc examples by @jozic in #4599

Behind-the-scenes

• fix MonadOps.scala and FunctionKMacros.scala dir by @xuwei-k in #4548
• Bump base version to 2.11 by @armanbilge in #4496
• add explicit type by @xuwei-k in #4508
• fix warning in build.sbt by @xuwei-k in #4518
• enforce new wildcard syntax by @xuwei-k in #4544
• Update copyright date by @geny200 in #4593

Updates

• Update sbt-typelevel, sbt-typelevel-site to 0.5.0 by @typelevel-steward in #4497
• Update sbt to 1.9.4 by @typelevel-steward in #4500
• Update scalafmt-core to 3.7.13 by @typelevel-steward in #4502
• Update scalafmt-core to 3.7.14 by @typelevel-steward in #4503
• Update sbt-jmh to 0.4.6 by @typelevel-steward in #4506
• Update scala3-library, ... to 3.3.1 by @typelevel-steward in #4507
• Update nscplugin, sbt-scala-native, ... to 0.4.15 by @typelevel-steward in #4505
• Update sbt-typelevel, sbt-typelevel-site to 0.5.1 by @typelevel-steward in #4509
• Update scala-library, scala-reflect to 2.13.12 by @typelevel-steward in #4510
• Update sbt-typelevel, sbt-typelevel-site to 0.5.2 by @typelevel-steward in #4511
• Update sbt to 1.9.5 by @typelevel-steward in #4512
• Update munit to 1.0.0-M9 by @typelevel-steward in #4513
• Update sbt to 1.9.6 by @typelevel-steward in #4515
• Update sbt-typelevel, sbt-typelevel-site to 0.5.3 by @typelevel-steward in #4517
• Update munit to 1.0.0-M10 by @typelevel-steward in #4516
• Update sbt-scalajs, scalajs-compiler, ... to 1.14.0 by @typelevel-steward in #4520
• Update sbt-typelevel, sbt-typelevel-site to 0.5.4 by @typelevel-steward in #4523
• Update flatMapF in nomenclature.md by @pera in #4525
• Update nscplugin, sbt-scala-native, ... to 0.4.16 by @typelevel-steward in #4526
• Update sbt-typelevel, sbt-typelevel-site to 0.6.0 by @typelevel-steward in #4527
• Update sbt to 1.9.7 by @typelevel-steward in #4529
• Update scalafmt-core to 3.7.15 by @typelevel-steward in #4530
• Update sbt-typelevel, sbt-typelevel-site to 0.6.1 by @typelevel-steward in #4532
• Update sbt-typelevel, sbt-typelevel-site to 0.6.2 by @typelevel-steward in #4535
• Update scalafmt-core to 3.7.17 by @typelevel-steward in #4536
• Update sbt-typelevel, sbt-typelevel-site to 0.6.3 by @typelevel-steward in #4538
• Update sbt-jmh to 0.4.7 by @typelevel-steward in #4539
• Update sbt to 1.9.8 by @typelevel-steward in #4541
• Update sbt-typelevel, sbt-typelevel-site to 0.6.4 by @typelevel-steward in #4542
• Update sbt-typelevel, sbt-typelevel-site to 0.6.5 by @typelevel-steward in #4546
• Update nscplugin, sbt-scala-native, ... to 0.4.17 by @typelevel-steward in #4550
• Update sbt-scalajs, scalajs-compiler, ... to 1.15.0 by @typelevel-steward in #4549
• Update munit to 1.0.0-M11 by @typelevel-steward in #4556
• Update sbt-typelevel, sbt-typelevel-site to 0.6.6 by @typelevel-steward in #4560
• Update scalafmt-core to 3.8.0 by @typelevel-steward in #4563
• Update sbt to 1.9.9 by @typelevel-steward in #4565
• Update sbt-typelevel, sbt-typelevel-site to 0.6.7 by @typelevel-steward in #4566
• Update scala-library, scala-reflect to 2.13.13 by @typelevel-steward in #4568
• Update scala-library, scala-reflect to 2.12.19 by @typelevel-steward in #4567
• Update scala3-library, ... to 3.3.3 by @typelevel-steward in #4571
• Update sbt-buildinfo to 0.12.0 by @typelevel-steward in #4577
• Update scalafmt-core to 3.8.1 by @typelevel-steward in #4578
• Update sbt-scalajs, scalajs-compiler, ... to 1.16.0 by @typelevel-steward in #4581
• Update discipline-core to 1.6.0 by @typelevel-steward in #4588
• Update scalacheck to 1.17.1 by @typelevel-steward in #4586
• Update sbt-typelevel, sbt-typelevel-site to 0.7.0 by @typelevel-steward in #4591
• Update munit to 1.0.0-RC1 by @typelevel-steward in #4592
• Update scala-library, scala-reflect to 2.13.14 by @typelevel-steward in #4594
• Update sbt to 1.10.0 by @typelevel-steward in #4596
• Update sbt-typelevel, sbt-typelevel-site to 0.7.1 by @typelevel-steward in #4597
• Update munit to 1.0.0 by @typelevel-steward in #4604

New Contributors

• @m50d made their first contribution in #4519
• @mainali123 made their first contribution in #4522
• @naferx made their first contribution in #4524
• @vreuter made their first contribution in #4551
• @chwthewke made their first contribution in #4575
• @Ghurtchu made their first contribution in #4583
• @geny200 made their first contribution in #4593
• @pomadchin made their first contribution in #4600

Full Changelog: v2.10.0...v2.11.0