Scalafix v0.6.0-M14

⚠️ This is an unstable and undocumented milestone release intended only for early adopters. It's recommended to stay on v0.5.10 until v0.6.0 stable is out.

IMPORTANT. If you are on sbt 1.1 and can't upgrade to sbt v1.2.1 then the recommended version is 0.6.0-M14-3 to work around sbt/sbt#4299 ClassCastException: sbt.internal.util.Init$SettingList.

• #786 Upgrade to Scalameta v4.0.0-M8. This is likely one of the last milestone releases before Scalameta v4. At this time there are 5 remaining open tickets in the milestone for v4.0 https://github.com/scalameta/scalameta/milestone/26
• #781 Support loading custom rules by their name instead of FQN. This allows custom rules to include a text file META-INF/services/scalafix.v1.Rule in resources with the FQN of the rule so that users can reference external rules by their name (for example NoVars) instead of the fully qualified class name (for example class:com.bar.NoVars).
• #783 Add scalafix-interfaces with Java APIs for reflective invocation. This PR adds a Java module scalafix-interfaces that can be used by build tools and IDEs to invoke Scalafix using JVM reflection. The module is 8kb with no external dependencies, the documentation is available here: https://www.javadoc.io/doc/ch.epfl.scala/scalafix-interfaces/0.6.0-M14
• scalacenter/sbt-scalafix#9 support scalafixDependencies: List[ModuleID] setting in sbt-scalafix to run external custom rewrites that are published to Maven. This feature is required for the upcoming Scala collection migration rewrites.
• scalacenter/sbt-scalafix#8 add back sbt 0.13 support to sbt-scalafix. The last M12 release only supported sbt 0.13.