Update junit-plugin, junit-runtime, ... to 0.4.9

Author: scala-steward

project/plugins.sbt

@@ -2,4 +2,4 @@ addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "3.0.1")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.2.0")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.2.0")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.10.1")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.7")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.9")