Update sbt-scala-native to 0.4.3

Author: scala-steward

project/build.sbt

@@ -2,6 +2,6 @@
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.0.0")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.8.0")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.3.9")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.3")
 
 addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "1.0.2")