Adding library args to `version` command?

[ninjamuffin99]

Right now haxelib version simply prints out the version of haxelib itself. However I think a good simple addition would be to allow args to be input which will then print out the current set library versions

something like

> haxelib version lime
9.1.3
> haxelib version flixel
git # haxelib list prints out simply "git" so we can do so here too

I think this is useful for cli use, maybe you want to parse through every haxelib installed and don't want to deal with parsing the list command.

I have a proof of concept (and usecase) for this, however instead of going through the back and forth of PR reviews, I'll use this issue for input