All our setup.cfg look like this:
universal = 1
The universal does no longer make sense for 4.8 and master branch. This creates wheels with tag py2.py3. However 4.8 is Python 3 only and the tag should reflect the fact. We should either use py3 or py36 as compatibility tag:
python-tag = py36
It's not a big deal, we also have python_requires=">=3.6.0" in all wheels.
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