Chaos compatibility testing?

[ChrisRackauckas]

@aplavin

I think it’s unambiguous that testing downgrades of direct + indirect deps is strictly better and leads to more reliable ecosystem than testing direct deps downgrades only. And the most direct way to do that would be just to flip the sign in the Pkg resolver (:

Oh I agree, and the discussion in PSA: Add Downgrade CI to Better Check Version Compatibility - #33 by Mason is to have the downgrade CI be updated to do exactly that (discussion in pkg-dev as well)