backport maybe better configuration produced on logilab-mt-converter
When upgrade the code base of logilab-mtconverter, Patrick did took the time to read the configurations of the linting/checking tools and did produce interesting better configuration files that we currently use.
Namely:
- mypy configuration file instead of cli arguments open-source/logilab-mtconverter!2 (diffs)
- pytest configuration inside of tox instead of cli arguments open-source/logilab-mtconverter!2 (diffs)