Switch joerick to pypa base for cibuildwheel

[Erotemic]

The pypa repo seems like it is more official, so I'm opting to point there, even though it does look like joerick is the lead maintainer.

[codecov]

Codecov Report

Merging #94 (aeb198d) into master (e7cace1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #94   +/-   ##
=======================================
  Coverage   52.84%   52.84%           
=======================================
  Files           5        5           
  Lines         422      422           
  Branches       60       60           
=======================================
  Hits          223      223           
  Misses        179      179           
  Partials       20       20           

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