Update sbt-scalajs, scalajs-compiler, ... to 1.20.1

Author: scala-steward-bot

project/plugins.sbt

@@ -2,7 +2,7 @@ addSbtPlugin("org.scalameta"      % "sbt-scalafmt"                  % "2.5.5")
 addSbtPlugin("com.github.sbt"     % "sbt-ci-release"                % "1.11.2")
 addSbtPlugin("de.heikoseeberger"  % "sbt-header"                    % "5.10.0")
 addSbtPlugin("com.github.sbt"     % "sbt-boilerplate"               % "0.7.0")
-addSbtPlugin("org.scala-js"       % "sbt-scalajs"                   % "1.19.0")
+addSbtPlugin("org.scala-js"       % "sbt-scalajs"                   % "1.20.1")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject"      % "1.3.2")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh"                       % "0.4.7")
 addSbtPlugin("com.github.sbt"     % "sbt-osgi"                      % "0.9.9")