v0.9.0-M1: Scala 3 support

What's changed

⚠️ This version may not be fully binary compatible with the 0.8 series. As this is a milestone version, it may not be binary compatible with the eventual 0.9.0 final release.

This version adds preliminary support for scala3.

The deriveTraverse macro functionality is still supported, but is not source-compatible with scala2's approach. The other derivation macros are not yet supported. We'd like to add support for those before the final version release.

Full changelog:

• Crossbuild scala-3 (#206) @Daenyth
• Modernize the sbt configuration, update to current cats (#194) @Daenyth
• Update build to sbt 1.5.1 (#191) @custommonkey
• Migrates from tut to mdoc (#192) @juanpedromoreno
• move COPYING to LICENSE.txt (#188) @pepegar
• remove mergify.yml (#186) @pepegar
• add sbt aliases (#184) @pepegar
• create repeatable nix environment (#183) @pepegar
• Stop cross-building reftree for scalajs (#182) @cb372
• Bump algebra and atto to versions with scala.js 1.0 releases (#181) @cb372
• Proposal: drop scala 2.11, upgrade scalajs to 1.1.1, cats to 2.2.0-M1, refined to 0.9.15 (#179) @oleg-py
• Modernize the Travis caching logic (#177) @ceedubs
• Update sbt to 1.3.13 (#176) @scala-steward
• Update sbt-microsites to 1.2.0 (#171) @scala-steward
• Update sbt to 1.3.10 (#170) @scala-steward
• Update sbt to 1.3.9 (#169) @scala-steward
• Update sbt-microsites to 1.1.5 (#168) @scala-steward
• Update sbt-microsites to 1.1.4 (#167) @scala-steward
• Update sbt-microsites to 1.1.3 (#165) @scala-steward
• Update sbt-microsites to 1.1.2 (#161) @scala-steward
• Update sbt-mima-plugin to 0.7.0 (#162) @scala-steward
• Update sbt-scala-native-crossproject, ... to 1.0.0 (#157) @scala-steward
• Add a Gitter chat badge to README.md (#109) @gitter-badger
• Update scalajs-compiler to 0.6.32 (#151) @scala-steward
• Update sbt-scalajs to 0.6.32 (#150) @scala-steward
• Update sbt-microsites to 1.1.0 (#147) @scala-steward
• Update sbt-release to 1.0.13 (#149) @scala-steward
• Update sbt-scalajs, scalajs-compiler to 0.6.31 (#138) @scala-steward
• Update scalacheck to 1.14.3 (#145) @scala-steward
• Update refined, refined-scalacheck to 0.9.12 (#152) @scala-steward
• Update sbt-mima-plugin to 0.6.4 (#156) @scala-steward
• Update sbt to 1.3.8 (#155) @scala-steward
• Add Mergify for patch updates (#158) @angoglez
• Migrate project to Bazel 2.1 (#159) @tzimisce012
• Update sbt to 1.3.4 (#139) @scala-steward
• Update sbt-gpg to 0.2.1 (#140) @scala-steward
• Update sbt-scoverage to 1.6.1 (#137) @scala-steward
• remove all usecase scaladoc tags, which crash sbt and prevent publishing (#136) @andyscott
• Add MiMa (#135) @travisbrown
• Update sbt-microsites to 0.9.7 (#131) @scala-steward
• Updates for Scala 2.13.0 (#134) @travisbrown
• Update sbt-release to 1.0.12 (#133) @scala-steward
• Update sbt-scalajs, scalajs-compiler to 0.6.29 (#125) @scala-steward
• Update dependencies (#120) @xuwei-k
• cache generated traverse instance ot a val (#115) @pepegar
• Prevent unsafe use of .fix syntax (#114) @andyscott
• Misc preparation for next release (#113) @andyscott
• Increment cats to 1.6.0 (#112) @Voltir
• Bump scoverage up (#106) @juanpedromoreno
• move package from qq.droste to higherkindness.droste (#104) @pepegar
• Add an instance for Basis[CoattrF[F, A, ?], Free[F, A]] (#103) @txsmith
• Fix/update the Bazel build (#105) @andyscott
• Scalafmt (#94) @pepegar
• split project syntax (#98) @pepegar
• Add snazzy logos (#99) @andyscott
• Add preliminary stream type; Update equality checking (#92) @andyscott
• add more fixes to traverse derivation (#90) @pepegar
• Fix up Nu to alleviate some overly restrictive types (#91) @andyscott
• Fix arbitrary case classes on deriving companions (#87) @pepegar
• add zygomorphism (#88) @clayrat
• Docs module added to compose Microsite of the library (#86) @AntonioMateoGomez
• Mu no longer extends FunctionK (#85) @ceedubs
• More tweaks to optimize/fix CI build (#83) @andyscott
• Reform DefaultTraverse (#81) @xton
• Tweak JVM options (#82) @andyscott
• Add unapply methods for data types (#79) @ceedubs
• Add the "g" version of folds and unfolds to SchemePartialBasis (#78) @ceedubs
• Migrate to a cleaner and separate scalacheck module (#77) @andyscott
• Update Nix/Bazel/Scripts/CI (#74) @andyscott
• Support Scala 2.13-M4 (#75) @andyscott
• Change some suspicious flatMaps to maps (#73) @ceedubs
• Minor typo (#71) @bluemoon
• Foldable operations on Project (#68) @pepegar
• Fix minor typo in para scaladoc (#69) @ceedubs
• Derive traverse (#67) @pepegar
• Remove Tuple2 and Either aliases (#65) @andyscott
• make @deriveFixedPoint annotation work on AppliedTypeTrees (#64) @pepegar
• Rename cofree/envt/free/coenvt to easier attr names (#62) @andyscott
• add pre/postpromorphisms (#61) @clayrat
• add tests for apoM/paraM (#60) @clayrat
• add apoM and paraM (#58) @clayrat
• Clean up dependencies & fix binary compat with Scalacheck/Refined (#55) @andyscott
• add Basis for ListF/List (#54) @clayrat
• [WIP] Add RefTree module for visualizations (#46) @andyscott
• deriveFixedPoint macro annotation (#51) @pepegar
• add embed & project syntax (#52) @pepegar
• Split function based hylo to kernel object (#49) @andyscott
• Split data files and add CoenvT (#47) @andyscott
• Add really simple demo of recursion without Fix (#48) @andyscott-stripe
• Add Trans and TransM helpers (#45) @andyscott
• Flush out generalized monadic unfolds/folds/refolds (#44) @andyscott
• Rearrange most type params to be left-to-right according to "arrows" (#43) @andyscott
• Remove unused file (#42) @andyscott
• Substantially enhance the README (#41) @andyscott
• Treat GAlgebra/GCoalgebra as arrows (#40) @andyscott
• Rework for better composition (#39) @andyscott
• Setup sbt release plugin (#38) @andyscott
• RIP distributive law. Hello gather/scatter (#37) @andyscott
• Add gcata/gana (#36) @andyscott
• Add tests for scheme.futu (#35) @andyscott
• Add scheme.dyna (#34) @andyscott
• Add futu/histo/chrono (#29) @andyscott
• Bump various versions of plugins/scala/etc (#33) @andyscott
• Cleanup syntax; add attr method to make EnvT (#32) @andyscott
• added unapply method for Cofree and EnvT (#31) @xton-stripe
• Export cats-core & cats-free from core module (#30) @andyscott
• Minor cleanup; Add ability to unfold to cats.free.Cofree (#28) @andyscott
• Add Basis.Solve to fix bug with helper methods (#27) @andyscott
• Add curried type helpers for guiding type inference for unfolds (#26) @andyscott
• Add a required prelude for data (#25) @andyscott
• Split Nu and Mu to separate files; rearrange associated basis implicits (#17) @andyscott
• Add laws! Check Basis for Fix/Cofree/Nu/Mu (#16) @andyscott
• Split AlgebraIso into traits and one typeclass (#13) @andyscott
• Add a Bazel build (#12) @andyscott
• Add a string parser for athema expressions (#10) @andyscott
• Add code coverage (#9) @andyscott
• Add Nu example from the weekend (#8) @andyscott
• Add athema math engine, for fun/demo (#7) @andyscott
• Add apomorphism & paramorphism (#5) @andyscott
• Add documentation and diagrams (#4) @andyscott
• Add ana/cata w/ monadic variants (#3) @andyscott
• Rework core module (#2) @andyscott
• Add basic tree data types (#1) @andyscott

📈 Dependency updates

• Update refined, refined-scalacheck to 0.9.26 (#198) @47erbot
• Update sbt to 1.5.5 (#205) @47erbot
• Update scalacheck to 1.15.4 (#200) @47erbot
• Update algebra to 2.2.3 (#204) @47erbot
• Update sbt-scoverage to 1.8.2 (#202) @47erbot
• Update atto-core to 0.9.5 (#203) @47erbot
• Update sbt-scala-native-crossproject, ... to 1.1.0 (#199) @47erbot
• Update sbt-github, sbt-github-mdoc to 0.9.3 (#196) @47erbot

Contributors to this release

@47erbot, @AntonioMateoGomez, @Daenyth, @Voltir, @andyscott, @andyscott-stripe, @angoglez, @bluemoon, @cb372, @ceedubs, @clayrat, @custommonkey, @gitter-badger, @juanpedromoreno, @oleg-py, @pepegar, @scala-steward, @sloshy, @travisbrown, @txsmith, @tzimisce012, @xton, @xton-stripe, @xuwei-k, Alex Gryzlov and Jeff Martin