Update dependency org.scalameta:sbt-scalafmt to v2.4.2

Author: renovate-bot

project/plugins.sbt

@@ -2,7 +2,7 @@
 addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % "0.6.0")
 
 // Scalafmt (formatter)
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.0")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.2")
 
 // Release
 addSbtPlugin("com.github.gseitz" % "sbt-release" % "1.0.13")