function prepareToDeployPlugins(done) {
  const folders = getPluginFolders();
  return gulp.parallel(
    folders.map(function (folder) {
      return function preDeployPlugin() {
        return preparePlugin(folder, false);
      };
    }),
  )(done);
}
Prepare plugins for deployment to gh-pages.
@param {Function} done Completed callback.
@returns {Function} Gulp task.