Merge pull request scala#225 from scala-steward/update/sbt-scala-native-crossproject-0.6.1

Update sbt-scala-native-crossproject, ... to 0.6.1

Author: Philippus

project/plugins.sbt

@@ -10,6 +10,6 @@ val scalaNativeVersion =
 
 addSbtPlugin("org.scala-native" % "sbt-scala-native" % scalaNativeVersion)
 
-addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.0")
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.1")
 
-addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "0.6.0")
+addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "0.6.1")