Update year-range in license file

Alhadis · Alhadis · commit 279437b4aaa1 · 2023-01-03T23:46:20.000+11:00
diff --git a/LICENSE.md b/LICENSE.md
@@ -1,5 +1,5 @@
 Copyright (c) 2014-2016 Daniel Brooker
-Copyright (c) 2016-2022 John Gardner
+Copyright (c) 2016-2023 John Gardner
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
