Update sbt-scalajs, scalajs-compiler, ... to 1.13.0 in master (#211)

Author: Atry

project/plugins.sbt

@@ -10,7 +10,7 @@ addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.2.1")
 
 addSbtPlugin("org.lyranthe.sbt" % "partial-unification" % "1.1.2")
 
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.12.0")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.13.0")
 
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.2.0")