Appveyor tests failing on Python 2.7

[jaraco]

See this build for an example. The virtualenv gets created with an old version of pip and while tox is in the process of upgrading pip to >=9, it's already too late because tox >= 3.11.2 or tox-run-command >= 0.4. creates an implied dependency on more_itertools, which gets resolved before pip is recent enough to honor the python_requires.

This environment needs to be updated to upgrade virtualenv before invoking tox... or maybe drop Python 2.7 support.

[webknjaz]

It's been fixed by 2900f6f and also upstream tox-dev/tox#1429.

I believe you just forgot to rebase your PR.

P.S. Also reported to jaraco/zipp#16.

[webknjaz]

Closing this as it'll be fixed next time tox does the release and a workaround has been applied to AppVeyor config already.