Scala 2.12.9 is available

On behalf of Lightbend Scala team, I am happy to announce Scala 2.12.9, bringing another 5% to 10% improvement in compiler performance, improved compatibility with JDK 11/12/13, and experimental infrastructure for build pipelining!

Thanks to many contributors, reporting the bugs and sending in the patches. For more details, please check out the release notes.