Upgrade Scala Native

Author: Antonio Alonso Dominguez

project/plugins.sbt

@@ -3,4 +3,4 @@ addSbtPlugin("org.scala-lang.modules" % "scala-module-plugin" % "1.0.8")
 addSbtPlugin("org.scala-js"     % "sbt-scalajs"              % "0.6.16")
 addSbtPlugin("org.scala-native" % "sbt-crossproject"         % "0.2.0")
 addSbtPlugin("org.scala-native" % "sbt-scalajs-crossproject" % "0.2.0")
-addSbtPlugin("org.scala-native" % "sbt-scala-native"         % "0.2.1")
+addSbtPlugin("org.scala-native" % "sbt-scala-native"         % "0.3.1")