Use Node.js 20

[LitoMore]

Changes

• Upgrade GitHub Actions runtime to Node.js 20
• Upgrade labeler runtime to Node.js 20
• Use latest npm lockfile version

Files are auto-formatted by Prettier.

I intentionally didn't update dist. We could update dist on the version release rather than on every commit/PR.

[mondeja]

I intentionally didn't update dist. We could update dist on the version release rather than on every commit/PR.

I think that is better to update on pre-commit with Husky and add the dist/ folder to .gitattributes with -diff option because in the future we'll forget about that.

[LitoMore]

I think that is better to update on pre-commit with Husky and add the dist/ folder to .gitattributes with -diff option because in the future we'll forget about that.

We can do it on another PR.

In the meantime, we can add an action to check if we forgot to update the dist.

[mondeja]

In the meantime, we can add an action to check if we forgot to update the dist.

This seems to be much more work. No problem, I'll add it in another PR.