uv

277e7f8d - uv-resolver: support conflicting groups

uv-resolver: support conflicting groups Surprisingly, this seems to be all that's necessary. Previously, we were only extracting an extra from a PubGrubPackage to test for conflicts. But now we extract either an extra or a group. The surrounding code all remains the same. We do need to add some extra checking for groups specifically, but I believe that's it.