Update to upstream version '6.2.0'
with Debian dir 04a410f8c2496889dd33b96070d8e2649d590083

This would be useful for the IPFS bridge, and seems good to complete the
API in any sense.

That hook can be frustrating as it can discard a long commit message
if it finds a typo in it so better removing it.

Update to upstream version '6.1.0'
with Debian dir c1d96220aa8a03aa7e43e8bf848a5ae1a1e21fb3

it's a piece of information used several times in the swh stack.

Related to T3922

black is considered stable since release 22.1.0 and the version
we are currently using is quite outdated and not compatible with
click 8.1.0, so it is time to bump it to its latest stable release.

Please note that E501 pycodestyle warning related to line length
is replaced by B950 one from flake8-bugbear as recommended by black.
https://black.readthedocs.io/en/stable/the_black_code_style/current_style.html#line-length

Related to T3922

Update to upstream version '6.0.1'
with Debian dir 748eb903aac0f6eb74545cc6cba79b73418e25a6

Hypothesis: This makes the documentation build fail.

This changes the deprecated :show-nested: instruction to the :nested: one [1].
This also fixes warning about misdefined block [2]

[1] https://sphinx-click.readthedocs.io/en/latest/usage/#directive-click

[2]
```
10:38:38  Warning, treated as error:
10:38:38  /var/lib/jenkins/workspace/DMOD/tests-on-diff/docs/cli.rst:14:Literal block expected; none found.
10:38:38  make: *** [../../swh-docs/Makefile.sphinx:32: sphinx/html] Error 2
10:38:38  make: Leaving directory '/var/lib/jenkins/workspace/DMOD/tests-on-diff/docs'
10:38:38  ERROR: InvocationError for command '/usr/bin/make -I ../.tox/sphinx/src/swh-docs/swh/ -C docs' (exited with code 2)
```

Update to upstream version '6.0.0'
with Debian dir 17ac1eea3ec942603d480d32420b7e871ef71925

committer=None happens on some malformed commits generated by old dgit
versions ; and it is possible for author=None to happen for the same reason.

Due to test modules being copied in subdirectories of the
build directory by setuptools, it makes pytest fail by raising
ImportPathMismatchError exceptions when invoked from root
directory of the module.

So ignore the build folder to discover tests.

these fields are computed attributes and may be removed from the backend
storage. Helps writing tests.

This will be used by swh.storage.backfill's tests.

Update to upstream version '5.0.0'
with Debian dir 8870039668bc3b92e27ffe99b7056d5fd5277aab

This reverts commit a0f54362.

This means this commit removes the 'offset' and 'negative_utc'
arguments.

It also removes the 'negative_utc' attribute (which is not used
anymore), but keeps an 'offset' property, which is an alias to
'offset_minutes()'. This is only to keep this commit readable;
the next commit will remove this alias.

To install the new hook:

  $ pre-commit install -t commit-msg

This should slightly reduce the memory used by dir/rev/rel objects