README.md in unicode-age-2.2.0 vs README.md in unicode-age-2.3.0

- old
+ new

@@ -21,6 +21,6 @@
 
 See the [Unicode — Ruby version table at Idiosyncratic Ruby](https://idiosyncratic-ruby.com/73-unicode-version-mapping.html)
 
 ## MIT License
 
-Copyright (C) 2016-2020 Jan Lelis <https://janlelis.com>. Released under the MIT license.
+Copyright (C) 2016-2021 Jan Lelis <https://janlelis.com>. Released under the MIT license.