Upgrade to Scala.js 1.14.0.

Author: sjrd

project/Build.scala

@@ -1580,6 +1580,7 @@ object Build {
             -- "ReflectiveCallTest.scala" // uses many forms of structural calls that are not allowed in Scala 3 anymore
             -- "UTF16Test.scala" // refutable pattern match
             -- "CharsetTest.scala" // bogus @tailrec that Scala 2 ignores but Scala 3 flags as an error
+            -- "ClassDiffersOnlyInCaseTest.scala" // looks like the Scala 3 compiler itself does not deal with that
             )).get
 
           ++ (dir / "shared/src/test/require-sam" ** "*.scala").get

project/plugins.sbt

@@ -6,7 +6,7 @@
 libraryDependencySchemes +=
   "org.scala-lang.modules" %% "scala-xml" % VersionScheme.Always
 
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.13.0")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.14.0")
 
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.9.21")