Support python310 pipe unions.

[BrianPugh]

Addresses #77

[BrianPugh]

@samsja can you give this a try and see if it resolves the bug you found?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0e62cf5) 95.80% compared to head (d743310) 95.81%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
+ Coverage   95.80%   95.81%   +0.01%     
==========================================
  Files          16       16              
  Lines        1667     1672       +5     
  Branches      415      416       +1     
==========================================
+ Hits         1597     1602       +5     
  Misses         34       34              
  Partials       36       36              

Flag	Coverage Δ
unittests	95.69% <85.71%> (-0.05%)	⬇️

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