addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject"      % "0.6.1")
addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "0.6.1")
addSbtPlugin("org.scala-js"       % "sbt-scalajs"                   % "0.6.31")
addSbtPlugin("org.scala-native"   % "sbt-scala-native"              % "0.3.9")