Drop older node versions from engines.node (align with ESLint 9?)

[voxpelli]

To keep up to date with our dependencies (#231, #228, #226, #222, #199) and to enable us to use modern JS features (#204 (comment)) I would suggest that we align with ESLint 9's engine range, ^18.18.0 || ^20.9.0 || >=21.1.0, for the next major release.

As I mention in #204 (comment), but haven't gotten any feedback on, I would like to address this issue before spending time on undoing modern JS to something old only to have us drop the old engines right afterwards.

[scagood]

I am completely in favour of aligning with eslint's supported version ranges 👍

We have already made the change in

• feat!: drop eslint v7 & node.js < 18 eslint-plugin-n#161
• chore!: Update node versions to align with eslint v9 eslint-plugin-promise#484

[github-actions]

🎉 This issue has been resolved in version 5.0.0-alpha.1 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[MichaelDeBoey]

Closed by #242