• Added "no comma-dangle" rule on eslint config file
• Ran npm run lint:fix to remove remaining trailing commas

I get an error from coverage threshold on tests for lib/server.js but, since it is happening on main branch too, I ignored the pre-commit hook. I can open a PR to add the missing test if needed.

Fixes: #6029

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct