installer+npm: increase range of engines to support Node.js 17

[abernix]

Currently, we're limiting the engines range on the npm installer for @apollo/rover to Node.js 14 through 16:

rover/installers/npm/package.json

Lines 30 to 33 in 6515eb3

	"engines": {
	"node": ">=14 <17",
	"npm": ">=6"
	},

On our other projects we somewhat heavily rely on the Node.js runtime and we want to be careful about experimental standard APIs and their changes. However, this @apollo/rover package is really just a very slim wrapper and our usage of the Node.js standard library is ... it looks like just using os:

rover/installers/npm/binary.js

Lines 43 to 44 in 6515eb3

	const type = os.type();
	const architecture = os.arch();

It would honestly be somewhat shocking if that API was broken in any Node.js version ever (touches wood), so I think we can even allow experimental versions when they become available.

Put another way, I think we can actually raise this to 17 already, and potentially even have Renovate automatically bump it to the latest release (in this particular package.json!)

Thoughts?