Consider if the subcommands `update` and `updates` are too similar

[seagreen]

It's not a big deal, but I think having commands that only differ by s might be confusing.

[paf31]

Let's rename updates. Any ideas for that to rename it to?

[hdgarrood]

check-updates, show-updates, list-updates?

[paf31]

Any of those sounds good to me 👍

[wereHamster]

npm/yarn use outdated – Checks for outdated package dependencies (https://yarnpkg.com/en/docs/cli/outdated)

[alexandradeas]

As we're on topic, I'm a fan of composable commands, so something like psc-package list --updates or upgradeable plays well with introducing an easy to use interface where you're remembering conventions rather than individual commands. Following a convention such as [action] [modifiers] similar to the interface for apt-get