Update nscplugin, sbt-scala-native to 0.5.2

Author: scala-steward-bot

project/plugins.sbt

@@ -6,4 +6,4 @@ addSbtPlugin("com.github.sbt" % "sbt-release" % "1.4.0")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.3.2")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.17")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.2")