Update nscplugin, sbt-scala-native to 0.5.9

Author: typelevel-steward[bot]

project/plugins.sbt

@@ -3,7 +3,7 @@ addSbtPlugin("org.typelevel" % "sbt-typelevel" % sbtTypelevelVersion)
 addSbtPlugin("org.typelevel" % "sbt-typelevel-site" % sbtTypelevelVersion)
 
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.1")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.17")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.9")
 
 addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.5.0")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.7")