• Use faulthandler when testing and fix discovered errors (#115, #117).
• Fix support for None username in credentials to be consistent in all backends (#99).
• Test also on cp38, cp39, cp310, cp311 and use cp38 for linting (#114, #107, #100).
• Add support for CredEnumerate extending code from @markb-EE (#110, #109, #111)
• Remove support for older python versions < cp36 (#104, #120).