docs(license): update copyright year(s) (#118)

Co-authored-by: github-actions <github-actions@github.com>

Author: github-actions[bot]

LICENSE

@@ -175,7 +175,7 @@ Apache License
 
    END OF TERMS AND CONDITIONS
 
-   Copyright 2017-2022 Mattias Kindborg
+   Copyright 2017-2023 Mattias Kindborg
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.