Run with both tox 3 and 4 on CI #35
Description
Currently we only run on tox 4 (pip install tox). We should have a second job with pip install tox<4 so we are sure we keep compatibility with that for now.
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Currently we only run on tox 4 (pip install tox). We should have a second job with pip install tox<4 so we are sure we keep compatibility with that for now.