Update node from node12 to node16

[bigearsenal]

No description provided.

[d3li0n]

Would be a really helpful release.

[maciejp]

Thanks for opening the PR, you beat me to it 😉 I think it might be nice to mention why it's important to do it:

Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.

[john-doherty]

HI @davereid-pfg who else need to approve these changes? Keen to get this live

[davereid-pfg]

I'm not a maintainer so they would need to approve them.

[sebastiankugler]

This is the first of three PRs to update to node 16. It suggests a version number 0.6.0, which I like because I see it as a feature release rather than a bugfix as suggested in #134.

I think it would be good though to update also the version number in package.json as suggested by @sfullerbeckman in #134.

[mpdude]

Released 0.6.0. Thank you all for your suggestions and patience!