* Remove use of ABCMeta for formatters
* Run mypy from tox
* Deprecate CommandManager namespace argument
* Warn on duplicate commands in the same namespace
* Revert "Implement conflict resolution"
* Implement conflict resolution
* typing: Fixups for typed stevedore
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-cliff?expand=0&rev=15
