chore: drop node 20 support

[jescalada]

Fixes #1456

Also fixes vulnerable dependencies via npm audit fix

[netlify]

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.66%. Comparing base (758b2db) to head (4fa50d3).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1462   +/-   ##
=======================================
  Coverage   89.66%   89.66%           
=======================================
  Files          68       68           
  Lines        4869     4869           
  Branches      888      888           
=======================================
  Hits         4366     4366           
  Misses        485      485           
  Partials       18       18           

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[jescalada]

Running npm audit fix seems to have broken the license check... The new license being added is Artistic-2.0, which appears to be harmless and comes from the Perl Foundation.

I'll add it to the allowed licenses for now. If inappropriate, I'm happy to revert the flatted dependency to the previous version 👍🏼

[re-vlad]

Consider mention changes into CHANGELOG so that the change is visible for anyone troubleshooting an unexpected engine mismatch after upgrading.

[jescalada]

@kriswest Ready for a look! Somehow the diff got butchered when trying to rebase, so I ended up merging in main instead...