Rakefile in cff-0.4.0 vs Rakefile in cff-0.8.0

@@ -1,5 +1,7 @@
-# Copyright (c) 2018 Robert Haines.
+# frozen_string_literal: true
+
+# Copyright (c) 2018-2021 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #