3.4.0-RC1 Release procedure

[Kordyjan]

• Publish 3.4.0-RC1 artifacts to Maven via CI
  • On release-3.4.0 branch:
    • In changelogs add file with a changelog
    • Tag the branch as 3.4.0-RC1
    • Build
• Wait for confirmation from tooling:
  • Metals (@tgodzik)
  • Scala CLI (@tgodzik)
  • Scala Native (@WojciechMazur)
  • Scastie (@rochala)
  • Scala DAP (@adpi2)
• On main:
  • In Build.scala: Set referenceVersion to 3.4.0-RC1
  • In Build.scala: Set baseVersion to 3.4.1-RC1
  • Check and update project/MiMaFilters.scala
  • In TastyFormat.scala: Set TASTy version to 28.5-1
  • Setup the 3.4.1 development #19321
• Announce the releases
  • Make GitHub releases public
  • Open the 3.4.0 tracking thread https://contributors.scala-lang.org

[Kordyjan]

Artifacts are published on Maven Central!

[adpi2]

I cannot release the current expression compiler on 3.4.0-RC1 because of some changes in the compiler API. I'll fix it in a future version of the scala-debug-adapter. You can ignore me for now.

[WojciechMazur]

Scala Native would require a new release due to changes in compiler API used in the plugin (WojciechMazur/scala-native@26235e7)
I'm still fixing the build to test runtime when compiled with 3.4.0-RC1

[WojciechMazur]

We've found a typer regression when testing Scala Native, probably RC2 would be required. Same regression is present in 3.3.2-RC1. #19324

Because we cannot finish testing procedure and are not able to publish a compiler plugin without a new release I suggest to publish 3.4.0-RC1 with acknowledgement of missing Scala Native of Scala DAP support which would be available in RC2 or later