CI Build Wheel fixes

[billbrod]

Two small changes:

• Fix failing CIBW builds: they were failing because the path for the tests were wrong (see docs)
• Adds cross-compilation support (see docs), which builds wheels for the new M2 Macs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (801c47f) 69.72% compared to head (3f75a17) 69.72%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #29   +/-   ##
=======================================
  Coverage   69.72%   69.72%           
=======================================
  Files          19       19           
  Lines        1460     1460           
  Branches      328      328           
=======================================
  Hits         1018     1018           
  Misses        348      348           
  Partials       94       94           

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