Scala2.13.0 rc2

[raboof]

Refs #506

Depends on:

• Publish for 2.13.0-RC2 scalapb/ScalaPB#586
• Either Play on 2.13.0-RC2 playframework/playframework#9336 or Move Play-specific code to their own repo's #517

[dwijnand]

• Either playframework/playframework#9336 or Move Play-specific code to their own repo's #517

https://github.com/playframework/playframework/releases/tag/2.8.0-M1 is out (http://repo1.maven.org/maven2/com/typesafe/play/play-server_2.13.0-RC2/2.8.0-M1/), just not announced.

[raboof]

That means requiring Play 2.8 though... we might not (yet?) want that?

[dwijnand]

I don't think we'll be developing more releases of akka-grpc/play-grpc for Play 2.7/Lagom 1.5. Onwards and upwards.

[marcospereira]

Or we can wait since we plan to have Scala 2.13 for Play 2.7 (but we will backport and release only 2.13 is GA).

[dwijnand]

Differently to Akka 2.5/2.6, Play 2.8 won't be binary compatible with Play 2.7, so we'll probably want to upgrade akka-grpc/play-grpc for Play 2.8. But we can also do that closer to Play 2.8 coming out rather than right now, if preferred. (Not what I would do.)

[raboof]

superseded by #599