codecov upload fails on Appveyor for Python 3.7.0:
https://ci.appveyor.com/project/pywikibot-core/pywikibot/builds/49706354/job/d5vbsvpea70rc4yn
... error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/ [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. ERROR: Failed building wheel for codecov-cli Failed to build codecov-cli ERROR: Could not build wheels for codecov-cli, which is required to install pyproject.toml-based projects Command exited with code 1
We use the 3.7.0 image on Appveyor but this is only available with VS 2013
https://www.appveyor.com/docs/windows-images-software/#python