Rakefile in openstudio-extension-0.2.0 vs Rakefile in openstudio-extension-0.2.1

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 ########################################################################################################################
 #  openstudio(R), Copyright (c) 2008-2020, Alliance for Sustainable Energy, LLC. All rights reserved.
 #
 #  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 #  following conditions are met: