Drop Python 2 wheel support

[davidparsson]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.54%. Comparing base (a1e5488) to head (461be15).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #300   +/-   ##
=======================================
  Coverage   96.54%   96.54%           
=======================================
  Files           1        1           
  Lines         608      608           
  Branches      103      103           
=======================================
  Hits          587      587           
  Misses         15       15           
  Partials        6        6           

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