It may still work, but the reality is probably that nobody knows.

- Python 3.9.2 is the default version of Python in current Debian oldstable.
  The current Debian stable (12, Bookworm) has already 1 year (june 2023).
- CubicWeb 4.5.2 was published at the end of 2023.

We would have liked to upgrade more.
However the new minimum versions are the ones of an active project.

The moto@v5 do not implement mock_s3 anymore, it uses mock_aws instead.
This version is used since we do have a python3.9 project (under it uses a
moto@v4 in which mock_s3 is still present).

Refs: #12,#13,#14,#15

Refs: #14

Refs: #13

Refs: #12

Refs: #15