Update to Node 20

[mckalexee]

This updates the minimum version to Node 20.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.34%. Comparing base (36db0f8) to head (1f043c5).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
- Coverage   80.03%   79.34%   -0.70%     
==========================================
  Files           9        9              
  Lines         506      489      -17     
  Branches      126      122       -4     
==========================================
- Hits          405      388      -17     
+ Misses         96       94       -2     
- Partials        5        7       +2     

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