enzief

Define non-orphan typeclass instances with less boilerplate

1

- Save some boilerplate when creating instances. For eg. `Monad` and `Traversable` which share `Functor`'s code. - Users don't need to import `scalaz.Scalaz._` if they only need less powerful TC,...

move Local instances into Ask companion

2

Follows https://github.com/typelevel/cats/pull/3043, moves typeclass instances from `Local` to `Ask` companion.

Cross build 2.12.x

4

Needed for downstreams to use 2.12.x Please advice on things to change and version bump.

Override mapJson in CodecJson

2

Does it make sense to ```scala sealed abstract class CodecJson[A] ... { override def mapJson(f: Json => Json): CodecJson[A] = CodecJson.derived( Encoder.mapJson(f), Decoder ) } ``` ?

Update Scala 2.13-M5 - include cats.data.Chain

1

Replaced `Stream` with the new `LazyList`, and added `cats.data.Chain` to the possible benchmarks. I haven't had a chance to re-run the benchmarks yet, updating results in README can be left...

[<ComicVn>] Connector not working

1

### Is there an existing issue for this connector? - [X] I have searched the existing issues ### Did you read the troubleshooting guide ? - [X] I read it...