Update to upstream version '0.0.67'
with Debian dir 38a85874acad3f027b7dec8a4a4aed1314513a08

and user required=True to check that, as it is the preferred way

hat tip to @rdicosmo for noticing

Update to upstream version '0.0.66'
with Debian dir 5dc3c4da5fb7b38713071c51e0eb2e0ccc3189e9

This also adapts the hypothesis strategies, using the plural form
origin_visit_statuses. That plural form is acceptable because in our context,
the statuses are countable.

Related to T2310

Update to upstream version '0.0.65'
with Debian dir 186667db6d343fd83910bbd0aec7ddb83f5e6b75

- blackify all the python files,
- enable black in pre-commit,
- add a black tox environment.

Update to upstream version '0.0.64'
with Debian dir 8a7feb21ef6754ee9319b12458178e009794d67e

Hinting at the origin_visit_update model

Related to T2310

A release may have an empty message, for instance those derived from
a Mercurial repository.

So make that field optional to avoid type validation errors.

Fix keyword parameters transmission to snapshots_d strategy.

Ensure max_size constraint is respected when fixing snapshot aliases.

With support for str representation of date.
Mostly for testing purpose.

instead of a reference to an Origin entity.

for each entity model `Model`, provide a `models_d` strategy that
produces dicts suitable for using as argument for the `Model.from_dict`
factory method, and reimplement the `models` generator using this
former hypothesis generator.

This is needed to help writing low level tests for model entities.

- add a validator for negative_utc (can be True iff offset is 0),
- update the timestamps_with_timezone hypothesis strategy,
- add low-level tests for it.

This ensures all instanciated model entities have valid types for attributes.

Related to T2308.

Update to upstream version '0.0.63'
with Debian dir 279c24fac8517e2a8272d9494793afe688b4d950

(pairing with @vlorentz)

Related to T2310