Update nscplugin, sbt-scala-native, ... to 0.4.17

Author: typelevel-steward[bot]

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject"      % "1.2.0")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.2.0")
 addSbtPlugin("org.scala-js"       % "sbt-scalajs"                   % "1.10.0")
-addSbtPlugin("org.scala-native"   % "sbt-scala-native"              % "0.4.9")
+addSbtPlugin("org.scala-native"   % "sbt-scala-native"              % "0.4.17")
 
 addSbtPlugin("org.scalariform" % "sbt-scalariform" % "1.8.3")