Merge pull request #557 from scala-steward/update/auxlib-0.5.4

Update auxlib, clib, javalib, junit-plugin, ... to 0.5.4

Author: Philippus

project/plugins.sbt

@@ -4,4 +4,4 @@ addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.3.2")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.16.0")
 
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.3")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.4")