mariadb package should have more dunders such as __version__

It would be useful if the mariadb package had dunders such as:

• __version__
• __version_info__
• __all__

I'm far from an expert, but there are some relevant PEPs on version, e.g.:
https://www.python.org/dev/peps/pep-0396/
https://www.python.org/dev/peps/pep-0440/

As always, StackOverflow is also useful:
https://stackoverflow.com/questions/458550/standard-way-to-embed-version-into-python-package