Consider Upgrading Node.js Version

[hacdias]

I'm opening this issue because fetching this repository with Node.js > 14 produces a warning. The current LTS version of Node.js is 18. I would suggest updating the version in package.json to the current LTC, and upgrade any dependencies if needed.

specref/package.json

Lines 35 to 37 in 04544e7

	"engines": {
	"node": "14.7.0"
	}

[tobie]

Totally makes sense. The only thing blocking this is time to do the work, making sure nothing breaks if we upgrade, and checking that we stay compatible with deployment on the Heroku stack. Is looking into any of this something that you'd be willing to do?