message: Update files array when deriving a bundle from a manifest
diff: @@ -243,6 +243,12 @@ export default class Bundler {
  },
  );
  + // If we have a `files` array then set it to all the newly added files
  + // This will have included files already there that we copied
  + if (newManifest.files !== undefined) {
  + newManifest.files = Array.from(files.keys());
  + }
  +
  // Add a package.json with updated values
  files.set(
  'package.json',
  