Update dependency org.wartremover:sbt-wartremover to v3.3.1

Author: renovate[bot]

project/plugins.sbt

@@ -20,7 +20,7 @@
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.4")
 
 // http://github.com/puffnfresh/wartremover
-addSbtPlugin("org.wartremover" % "sbt-wartremover" % "3.2.7")
+addSbtPlugin("org.wartremover" % "sbt-wartremover" % "3.3.1")
 
 // http://github.com/wartremover/wartremover-contrib/
 addSbtPlugin("org.wartremover" % "sbt-wartremover-contrib" % "2.2.1")