Update to upstream version '0.4.0'
with Debian dir 893a7b17ab26f448f7c269752543c1775b072045

Add a new extra_headers attribute on Revision and use it for computing
the revision's id instead of extract it from the metadata field.

Only accept (bytes, bytes) as extra_header.

Add a post init hook to Revision to initialize this new attribute from
given metadata, if any, for bw compat.

Also amend the revision_d hyptothesis strategy to generate extra_headers.

Update to upstream version '0.3.8'
with Debian dir 6542410c69982a1fbb034862d80255f390caa5b1

When Software Heritage persistent identifiers were introduced, they were not
yet abbreviated as SWHIDs.

Now that abbreviation is growing adoption, rename some functions and types in
swh.model.identifiers for consistency:

  - PersistentId -> SWHID

  - persistent_identifier -> swhid

  - parse_persistent_identifier -> parse_swhid

Backward compatibility with previous naming is maintained but deprecation
warnings are introduced to encourage the use of the new names.

Numerous variables in swh.model codebase have also been renamed accordingly.

Also rework and improve documentation.

Update to upstream version '0.3.7'
with Debian dir 4b528677b5793bfff8d84d77383fe7aeffb13664

Update to upstream version '0.3.6'
with Debian dir b0b3790969b9e2899982cecf19527c203935ecfb

Update to upstream version '0.3.5'
with Debian dir 94038e94a4a7870e94ddd3c21607eb5765f55955

Related to T2310

this aims at preventing constant usage of isinstance() based dispatch
code when writing generic code handling model entities.

For example, the "object_type" argument of JournalWriter.write_addition() has
become superflous now we only pass model entities, etc.

This idea comes olasd's reading of mypy doc:

  https://mypy.readthedocs.io/en/latest/literal_types.html#tagged-unions

This comes with a refactoring of from_dict.DiskBackedContent to make
it *not* inherit from model.Content: object_type being Final, it cannot
be overloaded.

Update to upstream version '0.3.4'
with Debian dir e334e0831ed8569265e5d10f4d9516a48cf060af

Related to T2310

Related to T2310

Update to upstream version '0.3.3'
with Debian dir 9db77e99e1d97178ca2fa7289a0004b6147bdb0f

This is not used. This is broken storage wise (origin-visit-add does not deal
correctly with it and it so happens there is no test around it).

And finally, this will soon go away with T2310.

Update to upstream version '0.3.2'
with Debian dir dab2ec29758546752e72a90100424daa98318438

And adapt the revisions_d() strategy accordingly.

This can be None, according to the model.

for the sake of consistency.