v0.21.0 * tests: recompute ids when evolving RawExtrinsicMetadata objects, to support swh-model 2.0.0 * deposit.loader: Make archive.tar the default_filename * debian: Make resolve_revision_from use the sha256 of the .dsc * package.loader.*: unify package "cache"/deduplication using ExtIDs * package.loader: Lookup packages from the ExtID storage * package.loader: Write to the ExtID storage