Update dependencies

[mantoni]

Purpose (TL;DR) - mandatory

• Upgrade Sinon project dependencies
• Update all tooling dependencies
• Upgrade prettier to v3 and reformat all files
• Drop support for node 14, add node 20 to the build matrix

How to verify - mandatory

1. Check out this branch
2. npm install
3. npm run lint
4. npm test
5. npm run build

Checklist for author

• npm run lint passes
• References to standard library functions are cached.

[mroderick]

By using lts/* for node-version, we don't need need to keep updating these lines.

See https://github.com/actions/setup-node#supported-version-syntax

There is one use of actions/setup-node@v2 where I couldn't make a suggestion for using v4 in the GitHub UI.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a1f8eb4) 100.00% compared to head (e710b9d) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #253   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           81        81           
  Lines          666       666           
=========================================
  Hits           666       666           

Flag	Coverage Δ
unit	100.00% <ø> (ø)

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[mantoni]

@mroderick Thanks! There's always a little thing to learn every day 🧑‍🎓