addSbtPlugin("org.scala-sbt" % "sbt-houserules" % "0.3.3") addSbtPlugin("org.scala-sbt" % "sbt-contraband" % "0.3.0-M9") // addSbtPlugin("com.lucidchart" % "sbt-scalafmt" % "1.3") scalacOptions += "-language:postfixOps"