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

Author: 47erbot

project/plugins.sbt

@@ -1,6 +1,6 @@
 addSbtPlugin("com.github.sbt"       % "sbt-ci-release"           % "1.5.11")
 addSbtPlugin("org.portable-scala"   % "sbt-scalajs-crossproject" % "1.2.0")
-addSbtPlugin("org.scala-js"         % "sbt-scalajs"              % "1.12.0")
+addSbtPlugin("org.scala-js"         % "sbt-scalajs"              % "1.13.0")
 addSbtPlugin("org.scalameta"        % "sbt-scalafmt"             % "2.5.0")
 addSbtPlugin("com.47deg"            % "sbt-microsites"           % "1.4.1")
 addSbtPlugin("org.scalameta"        % "sbt-mdoc"                 % "2.3.6")