licence: update year
# BSD 3-Clause License
-Copyright (c) 2004-2021 [Elektra Initiative](/doc/AUTHORS.md). All rights reserved.
+Copyright (c) 2004-2022 [Elektra Initiative](/doc/AUTHORS.md). All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
