conan remove --outdated works with a pattern too

[Croydon]

According to the documentation conan remove --outdated works only with references, which implies that it does not work with patterns

https://docs.conan.io/en/latest/reference/commands/misc/remove.html

  -o, --outdated        Remove only outdated from recipe packages. This flag
                        can only be used with a reference

Coming from bincrafters/community#1320, it seems to work perfectly fine with a pattern.

See e.g. https://github.com/bincrafters/bincrafters-conventions/blob/0ec9c9f5052a00bbcdb962d8dae0117b131ac323/.github/workflows/remove-obsolete-packages.yml#L29

[solvingj]

It was probably trying to distinguish the usage from the common string path_or_reference which is featured in many commands. But yes, explicitly adding that it accepts a pattern seems reasonable.