Add note on future steps to take

Author: nicolasstucki

project/Build.scala

@@ -984,9 +984,13 @@ object Build {
     settings(commonStdlibBootstrappedSettings).
     settings(
       scalacOptions += "-Yscala2-stdlib",
-      Compile/scalacOptions ++= {
+      Compile / scalacOptions ++= {
         Seq("-sourcepath", ((Compile/sourceManaged).value / "scala-library-src").toString)
       },
+      // TODO package only TASTy files.
+      // We first need to check that a project can depend on a JAR that only contains TASTy files.
+      // Compile / exportJars := true,
+      // Compile / packageBin / mappings ~= { _.filter(_._2.endsWith(".tasty")) },
       mimaCheckDirection := "both",
       mimaBackwardIssueFilters := MiMaFilters.StdlibBootstrappedBackwards,
       mimaForwardIssueFilters := MiMaFilters.StdlibBootstrappedForward,