vulcan update command

[ayhid]

I am posting this on behalf of dalerka on slack

Easy updating of Vulcan and vulcan-packages is very important for Dev eXperience, painful for beginners like myself. It'd be great to have cli-commands something like vulcan update to update the core or to latest release and vulcan update --all-packages for other vulcan:packages and maybe vulcan update --release @1.6.0 to revert to specific release.