test: Add Node 20 to CI matrix

[BilalQamar95]

Description

As a first step in the upgrade to Node 20, add it to the CI matrix as a non-blocking test.

See the tracking issue for further information.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.41%. Comparing base (21d20ed) to head (6e305d4).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #732   +/-   ##
=======================================
  Coverage   83.41%   83.41%           
=======================================
  Files          40       40           
  Lines        1073     1073           
  Branches      197      197           
=======================================
  Hits          895      895           
  Misses        166      166           
  Partials       12       12           

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