Cats 2.7.0

The most significant change in this release is the incorporation of the Typelevel Algebra project within Cats. Cats has long been the primary downstream dependent of this library, and it has significant overlap with a lot of the Cats core mission. Note that this change was made without breaking binary compatibility for transitive downstream users of Algebra, meaning that the package remains algebra rather than the more-conventional cats.algebra. This will be adjusted in Cats 3, which has no timeline at present.

Additions

• #4052 Optimize Alternative (part 2): add prependK/appendK specializations for std containers by @satorg
• #4014 optimize Alternative (part 1): introduce NonEmptyAlternative with prependK and appendK methods by @satorg
• #3931 Add missing methods to VectorOps by @satorg
• #4036 Adding Id.apply by @BalmungSan
• #4032 Invariant[Fractional] by @tmccarthy
• #4029 Add parReduceMapA by @isomarcte
• #4007 Introduce parReplicateA by @RafalSumislawski
• #4015 Implement OptionT#foreachF by @armanbilge
• #3979 Add Semifield and CommutativeSemifield to algebra by @armanbilge
• #3963 NonEmptyMap: add new methods by @satorg
• #3987 Implement InvariantCoyoneda by @armanbilge

Changes

• #3997 Relax a constraint for Alternative's unite and separate methods from Monad to FlatMap by @satorg
• #4044 Incorrect deprecated messages by @jmgimeno
• #4046 Add missing else keyword to example by @Steve
• #4040 Add Adobe CCA team as users of Cats by @gatear
• #4039 Remove out-of-date comment by @TimWSpence
• #4037 Typo fix: ',' instead of '=>' by @JakubSzczerbinski
• #4026 Using cats.syntax.all instead of cats.implicits in the docs by @BalmungSan
• #4024 Add library Jms4s to the ecosystem page by @benkio
• #4017 Adding Medidata as an Adopter in the README.md by @tmilner
• #4013 Add SEEK Limited to Adopter list by @bjing
• #4005 Typelevel ecosystem broken links fix by @benkio
• #3944 add identity hash to alleycats by @SimY4
• #3985 Add NetworkedAssets to adopters list by @RafalSumislawski
• #3984 Use OpenCollective GraphQL API to render sponsors by @armanbilge
• #3918 Binary-compatibly move typelevel/algebra into cats repo by @armanbilge
• #3972 Render sponsors from Open Collective REST API by @rossabaker
• #3967 override toIterable more and use it by @johnynek
• #3960 Fix traverse_ for List and Vector to be stack safe by @johnynek
• #3949 Added implementation of Eq[Free] by @djspiewak
• #3956 Configure microsite image directory by @rossabaker
• #3958 Eq[NonEmptySet[A]] now needs Eq[A], not Order[A] by @domaspoliakas
• #3945 Cleanup ScalaStyle things by @danicheg
• #3951 Override map2Eval in FlatMap by @vasilmkd
• #3943 Use new sbt syntax for fmt commands by @danicheg
• #3932 Add Tranzzo to adopters list by @gorbylov
• #3894 Test FunctionK in scala 3 by @bplommer
• #3893 Deprecate ifA by @diesalbla
• #3909 Add doctests to Bifoldable by @brs96
• #3906 Move Id instances into implicit scope for Scala 3 by @joroKr21