Clarify node version requirement with engines

[IanVS]

I'm stuck on Node 8 for the time being, and I'm not able to install snowpack because of some of the dependencies being used, specifically:

https://github.com/sindresorhus/got
https://github.com/sindresorhus/execa
https://github.com/jonschlinkert/strip-comments
https://github.com/isaacs/node-mkdirp
https://github.com/rollup/rollup
and probably others.

got specifies node >=10.19.0 in their engines, so I think that's the minimum that Snowpack can support as well.

[FredKSchott]

Sorry, at this time we don't have the extra bandwidth to support legacy/unmaintained versions of Node v8. You'll need to upgrade Node.js (you can do this locally, without affecting the version of Node.js that runs in a server/production environment).

[IanVS]

Yeah totally! I just think you should be explicit about it by adding:

"engines": {
	"node": ">=10.19.0"
},

to your package.json file.

[FredKSchott]

Oh, gotcha! I misunderstood :)

Yes, that makes total sense. would love a PR to add this if you're able to!

[IanVS]

Sure thing. I haven't really used discussions before. Should I reference this discussion in the PR to "close" it?