bugfixes:
- mysql_user - added tests to verify that TLS requirements are removed with an empty ``tls_requires`` option (https://github.com/ansible-collections/community.mysql/issues/20).
- mysql_user - correct procedure to check existing TLS requirements (https://github.com/ansible-collections/community.mysql/pull/26).
- mysql_user - minor syntax fixes (https://github.com/ansible-collections/community.mysql/pull/26).