Documentation request: what versions of Node are available?

[NickHeiner]

Using NodeJS With Github Actions seems like the most relevant docs, but I don't see anything about figuring out which versions of Node setup-node will accept.

I'd hope to see functionality like nvm's ls-remote.

[jyasskin]

Looking at the source, it appears to fetch the possible versions from https://nodejs.org/dist/index.json and support general semver matching on those versions. 👍 on writing that down, of course.

[bryanmacfarlane]

Will cover with this issue: #164