Consider using cibuldwheel for building binary wheels.

[fgregg]

I've found that pypa's cibuildwheel tool has made building wheels across a variety of platforms and python versions a lot better.

We might want to consider using here.

[icemac]

See https://github.com/zopefoundation/ExtensionClass/pull/39 where I tried cibuildwheel on a simpler package. Any help to get it flying is welcome.