Publish Scala modules (& etc) for 2.13.0-RC1

[SethTisue]

round 0

• scala-js 0.6.27 & 1.0.0-M7 @sjrd
• scala-parallel-collections 0.2.0 @SethTisue

round 1

• scala-xml 1.2.0 @ashawley
• scala-parser-combinators 1.1.2 @Philippus
• scala-collection-compat 1.0.0 @szeiger
• genjavadoc @SethTisue / @2m

round 2

• scala-async @retronym
• scala-swing @Sciss

maybe?

• scala-java8-compat (obsolete, but provide shims for cross-building?) @lrytz

when a module is published, please add it to https://github.com/scala/make-release-notes/blob/2.13.x/projects-2.13.md

[SethTisue]

@ashawley are you available to publish scala-xml today? if not, someone on the Scala team can do it

@Sciss are you available to publish scala-swing?

@sjrd I know you're all over it without even asking

[Sciss]

@SethTisue I think I never actually ran the publish action, and I'm quite busy until end of next week, but I could simply push the necessary changes into the repository for someone else to handle the Sonatype thing?

[SethTisue]

@Sciss releasing a module involves these steps:

1. module maintainer makes any necessary source changes
2. module maintainer pushes a tag
3. if it's a new module version, please also write release notes (not applicable if back-publishing existing version for new Scala version.)
4. Travis-CI automatically stages the release on Sonatype
5. (upon request by module maintainer) Scala team member optionally sanity checks the staged JARs, then hits "release"

see https://github.com/scala/scala-swing/blob/work/admin/README.md

[Sciss]

waiting for ScalaTest...