add macos and windows workflow

[codecov[bot]]

Codecov Report

Merging #54 (46a3426) into main (aa2b291) will decrease coverage by 0.14%. The diff coverage is 52.00%.

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
- Coverage   93.97%   93.84%   -0.14%     
==========================================
  Files          18       18              
  Lines        6660     6679      +19     
==========================================
+ Hits         6259     6268       +9     
- Misses        401      411      +10     

Impacted Files	Coverage Δ
pygmtools/dataset.py	89.72% <52.00%> (-1.11%)	:arrow_down:

... and 1 file with indirect coverage changes

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