Update to upstream version '6.4.0'
with Debian dir 57a9924f627e97fd6dad7f13a16705030ad01fca

This is needed by swh-scrubber when recomputing the hash of such snapshots.

It allows building a snapshot manifest despite some branches being
unresolved (instead of raising an error).

This feature was removed in 57ae405d
but in the end, Snapshot.compute_hash() will need to use it so that
swh-scrubber does not crash when checksum such snapshots.

Update to upstream version '6.3.1'
with Debian dir 9bbf55bd07c86e39151c728804d2814904ab62d9

hypothesis.strategies.integers() is inclusive, but microseconds values
greater or equal to 1 million are rejected by the model

Update to upstream version '6.3.0'
with Debian dir 85d553b6ac819dbc1ba83045ebbbb812d44162b1

This allows callers to pass different (typically, stricter) strategies
to hypothesis instead of filtering the output; which makes example
generation faster.

It will be used by swh.storage.backfiller (so indirectly, swh.scrubber)
to load directories from the postgresql database, whose schema accidentally
allowed directories with duplicate entries -- without corrupting the
shape of the directory too much.

We can use `format_git_object_from_parts` inside it.

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we are currently using is quite outdated and not compatible with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.