Update engines in package.json to use Node.js between 18.17 and 22

[luiscmilano]

Summary

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Review / Merge checklist

• PR title and summary are descriptive. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.
• PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)

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[Joffcom]

Hey @luiscmilano,

Thanks for the PR, We have created "GHC-773" as the internal reference to get this reviewed.

One of us will be in touch if there are any changes needed, in most cases this is normally within a couple of weeks but it depends on the current workload of the team.

[netroy]

nodejs 18 goes end-of-life in 81 days, and we don't want to support it for development purposes. You can always use n8n from npm until then.

Since this file is for contributors only, where we expect atleast nodejs 20, I'm going to close this PR.