Update billiard to 4.1.0

[pyup-bot]

This PR updates billiard from 3.6.3.0 to 4.1.0.

Changelog

4.1.0

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- Fixed a python 2 to 3 compat issue which was missed earlier (374).
- Adde Python 3.11 primary support

4.0.2

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- ExceptionWithTraceback should be an exception.

4.0.1

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- Add support for Python 3.11 _posixsubprocess.fork_exec() arguments.
- Keep exception traceback somehow (368).

4.0.0

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- Support Sphinx 4.x.
- Remove dependency to case.
- Drop support of Python < 3.7.
- Update to psutil 5.9.0.
- Add python_requires to enforce Python version.
- Replace deprecated threading Event.isSet with Event.is_set.
- Prevent segmentation fault in get_pdeathsig while using ctypes (361).
- Migrated CI to Github actions.
- Python 3.10 support added.

3.6.4.0

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- Issue 309: Add Python 3.9 support to spawnv_passfds()
- fix 314

Links

• PyPI: https://pypi.org/project/billiard
• Changelog: https://pyup.io/changelogs/billiard/
• Repo: https://github.com/celery/billiard

[pyup-bot]

Closing this in favor of #240