Add ParallelEnumerate overloads with degreeOfParallism

[nietras]

Fixes #103

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.17%. Comparing base (6a3cf86) to head (02ce93f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #106   +/-   ##
=======================================
  Coverage   99.17%   99.17%           
=======================================
  Files          45       45           
  Lines        3269     3282   +13     
  Branches      348      351    +3     
=======================================
+ Hits         3242     3255   +13     
  Misses         24       24           
  Partials        3        3           

Flag	Coverage Δ
Debug	98.50% <87.50%> (-0.06%)	⬇️
Release	99.03% <83.33%> (-0.09%)	⬇️
macos-latest	98.81% <87.50%> (-0.06%)	⬇️
ubuntu-latest	98.81% <87.50%> (-0.06%)	⬇️
windows-latest	98.81% <87.50%> (-0.06%)	⬇️

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