In previous Cats 2.2.0 pre-releases, all type class instances for Scala standard library types were available in implicit scope, except for the ones for Future. We made the decision to exclude those instances in part because putting them into implicit scope required duplicating some instances from cats-core in cats-kernel, which hadn't previously included any Future-related code. This release candidate reverses that decision and makes all type class instances available in implicit scope. It also includes a fix for one method on NonEmptyLazyList for Scala 2.13.

This release candidate has the same binary compatibility guarantees as 2.2.0-RC3, and is backward binary-compatible with that release.

2 API / feature enhancements

• #3572 Add Future instances to implicit scope by @travisbrown
• #3573 Avoid all evaluation of NonEmptyLazyList#reduceRightTo by @takayahilton

2 documentation improvements

• #3575 Missing a "]" in CONTRIBUTING.md by @benkio
• #3574 Update README.md by @diesalbla