Conan package revisions
Problem
The Conan package manager has a revisions feature that the GitLab package registry does not yet support.
Proposal
Add support for Conan revisions to the GitLab package registry.
Notes
Revisions are part of the v2 Conan API. GitLab has implemented v2, so we have the ability to support revisions, however, the revision is currently hardcoded as '0'
for all packages.
Revisions parallel the idea of Maven snapshots. The same package version can be uploaded many times, but each is differentiated by their unique revision.