docs
Config to publish only core/modules.

Set `publishSonatypeTaskCore` to e.g., `init` to skip publishing Scala core.
This is useful to publish only a certain module,
before publishing a new version of Scala.

You could also mess with `publishSonatypeTaskModules`,
but I don't see the point of that.
Merge pull request #118 from adriaanm/docs-pubmod

Allow publishing modules without publish a new version of Scala