Upgrade to Node18

[mkukawski]

It seem to use Node 16 still

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[jsmatfess]

I wanted to +1 this @ravgeetdhillon. GitHub is deprecating Node 16 actions and recommending that they be upgraded to Node 20. We've started getting warnings on our workflows.

https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20

[ravgeetdhillon]

This has been fixed in #124.