Add nodetimeline command

[bnb]

This PR is a first pass at a nodetimeline command. Before writing docs I'd like to get feedback on the API 🙌

Two notes:

I initially had an --eol flag but it did not play well with line 67, which checks what the latest version is – it seems getEOL() doesn't return identical data to the others (which is fine!).

I could also add checking a specific version, but figured I'd get this up since it's starting to get a bit late and I've been working on this for a few hours now.

[bnb]

Interestingly enough Node.js v10 is now returning isActive as true, contrary to what the README.md shows (and what should still be returned). Not sure if this is an issue or not 🤔

[nw]

Interestingly enough Node.js v10 is now returning isActive as true, contrary to what the README.md shows (and what should still be returned). Not sure if this is an issue or not 🤔

Two issues at play here:

• The schedule.json in nodejs/release repo indicates v10 goes into active LTS on Oct 1st (monday).
• There appears to be a slight rounding error with dates. It rounds to the closest day. Which for most purposes is fine, it just gets awkward in situations like this.

[nw]

Fun little tool. LGTM👍

Let's wait to see what happens tomorrow before we publish a release. If it does I need to start tracking v11.

[bnb]

Created an issue to check in on v10: nodejs/Release#361

I’ll shoot over a PR including docs for nodetimeline later today 👍