MIT-LICENSE in stones-1.1.1 vs MIT-LICENSE in stones-1.1.3

@@ -1,5 +1,5 @@
-Copyright 2012-2019 Dittmar Krall - http://matique.de
+Copyright (c) 2012-2021 Dittmar Krall - www.matique.com
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
 "Software"), to deal in the Software without restriction, including
 without limitation the rights to use, copy, modify, merge, publish,