[feature request] list dependees in addition to dependencies

[pseyfert-sevensense]

just started trying out kellnr here and clicking through the web-ui, i was wondering if one could list the dependees of a package in addition to the dependencies. (possibly also transitive dependees). such that if i'm about to update a package, i can check "who uses this api?" "whom should i poke to migrate to a new api?" "which functions aren't used by anyone?" "which packages should i urgently re-build because of a security issue?". no strong preference here about what would be a good play to provide that information, crates.io has 'dependents' as tab next to 'dependencies' and 'versions' and 'readme', but that's just one option.