WiP Scala.js async/await, including JSPI.

Author: sjrd

.github/workflows/ci.yaml

@@ -155,7 +155,9 @@ jobs:
 
       - name: Scala.js Test
         run: |
-          ./project/scripts/sbt ";sjsSandbox/run ;sjsSandbox/test ;sjsJUnitTests/test ;set sjsJUnitTests/scalaJSLinkerConfig ~= switchToESModules ;sjsJUnitTests/test ;sjsCompilerTests/test"
+          ./project/scripts/sbt ";sjsSandbox/run ;sjsSandbox/test ;sjsJUnitTests/test ;set sjsJUnitTests/scalaJSLinkerConfig ~= switchToESModules ;sjsJUnitTests/test"
+          ./project/scripts/sbt ";sjsJUnitTests/clean ;set sjsJUnitTests/scalaJSLinkerConfig ~= switchToLatestESVersion ;sjsJUnitTests/test ;set Global/enableWebAssembly := true; sjsJUnitTests/test"
+          ./project/scripts/sbt ";sjsCompilerTests/test"
 
   test_windows_fast:
     runs-on: [self-hosted, Windows]