Change CrossVersion.full to use CrossVersion.patch for Typelevel Scala compatibility.

[ClydeMachine]

Including text from the issue at typelevel/scala#135:

To use Typelevel Scala versions which are not exactly aligned with the corresponding Lightbend Scala version (ie. because they include an additional -bin-patch-nnn suffix in their version) we need to modify project builds which use CrossVersion.full (which includes the suffix) to use CrossVersion.patch (which doesn't) where appropriate (eg. for macro-paradise and other compiler plugins).

[larsrh]

GitHub didn't notice that the build is actually green. Thanks for the PR!