Merge pull request #326 from scala-steward/update/sbt-scalajs-1.13.0

Update sbt-scalajs, scalajs-compiler, ... to 1.13.0

Author: satabin

project/plugins.sbt

@@ -1,4 +1,4 @@
 addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.4.18")
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.11.0")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.13.0")
 addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.10")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.2.0")