Update nscplugin, sbt-scala-native to 0.5.6

Author: scala-steward

project/plugins.sbt

@@ -1,6 +1,6 @@
 addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.7.4")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.17.0")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.17")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.6")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.21.1")
 addSbtPlugin("com.github.tkawachi" % "sbt-doctest" % "0.10.0")