Alias latest to stable

[dominykas]

There was a similar issue #731 way back when, and it was closed for a reason, however I think it might be worth revisiting.

As part of scanning top 1000 packages in the ecosystem for .travis.yml, I found that 3 (yes, that's 0.3%) use latest as one of the options in the list of the versions they want to test. Naturally, they have failing builds.

I suspect there might be more people using this keyword, so it might be useful to just help them out and make latest install stable (aka node).

[ljharb]

It's not a bad suggestion.

At this point, though, unless I was able to add a way to suppress most "default"/"built in" aliases when not locally installed, but leave them discoverable, I'm hesitant to add more of them. nvm ls output is noisy enough.

For example, if unstable and stable could always be hidden, but functional, and iojs could be hidden when no io.js version was installed - but the nvm alias output hinted at some kind of nvm alias --all/nvm ls --all-aliases command that listed them all - then i'd probably want to add latest, and make node no longer be the encouraged form, since i think "latest" is a bit clearer.