Merge pull request #188 from scalacenter/update/sbt-scalafix-0.12.1

Update sbt-scalafix to 0.12.1

Author: adpi2

sbt-plugin/project/plugins.sbt

@@ -1,4 +1,4 @@
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.12")
 addSbtPlugin("org.scala-sbt" % "sbt-contraband" % "0.5.3")
-addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.11.1")
+addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.12.1")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.12.0")