Modernize setup files

[jbusecke]

Towards #45

[codecov]

Codecov Report

Merging #54 (3f9d51e) into master (a313061) will increase coverage by 4.62%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #54      +/-   ##
==========================================
+ Coverage   75.00%   79.62%   +4.62%     
==========================================
  Files           3        3              
  Lines         344      324      -20     
  Branches       59       58       -1     
==========================================
  Hits          258      258              
+ Misses         63       43      -20     
  Partials       23       23              

Flag	Coverage Δ
unittests	79.32% <0.00%> (+4.61%)	⬆️

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Impacted Files	Coverage Δ
setup.py	0.00% <0.00%> (ø)

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