Relicensing as GPL3+

Author: hackademix

LICENSE.txt COPYINGLICENSE.txt renamed to COPYING

@@ -1,9 +1,9 @@
 NoScript - a Firefox extension for whitelist driven safe JavaScript execution
-Copyright (C) 2005-2021 Giorgio Maone - https://maone.net
+Copyright (C) 2005-2021 Giorgio Maone <https://maone.net>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
+the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,