meta: run ci on node 18

[gamemaker1]

Related Issues

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What Does This PR Do?

Added

• Runs Lint and Publish steps of CI on Node 18.
• Added Node 18 to version matrix for Test steps too.

Caveats/Problems/Issues

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Checklist

• The issues that this PR fixes/closes have been mentioned above.
• What this PR adds/changes/removes has been explained.
• All tests (npm test) pass.
• All added/modified code has been commented, and
  methods/classes/constants/types have been annotated with TSDoc comments.
• If a new feature has been added or a bug has been fixed, tests have been
  added for the same.

[gamemaker1]

@nfriedly should we stop running tests on Node 12? (EOL for Node 12 is April 30th, 6 days from now)

[nfriedly]

I like adding 18 to the list, but I'd prefer to keep 12 unless there's some incompatibility with a feature that we (or, more likely, one of our dependencies) needs.

I think we could drop 15 and 17, though. Neither are LTS releases, and I find it unlikely that we'd hit any issue in on of those that isn't also in 14, 16, or 18. I generally like to test against a variety of LTS releases, + whatever the current release is.

[gamemaker1]

Sounds good, I'll keep 12 but drop 15 and 17 then

[nfriedly]

Approving now based on our conversation; I'm going to be out most of the rest of the day.

[gamemaker1]

Thanks, have a good day :D