Hi!

As a maintainer we know how much effort we need to keep updated all our packages. But sometimes we have outdated packages, after uploading a new recipe/package.

Would be nice removing all outdated packages by CPT, avoiding any manual work.

My idea is include some new flag, CONAN_REMOVE_OUTDATED.
When true, CPT runs conan remove -r upload_repo <reference> --outdated --force

Regards!