Update celery requirement from <4.1,>=4.0 to >=4.0,<5.4

[dependabot]

Updates the requirements on celery to permit the latest version.

Release notes

Sourced from celery's releases.

v5.3.0

Release Highlights

Quality Improvements and Stability Enhancements

Celery 5.3 focuses on elevating the overall quality and stability of the project. We have dedicated significant efforts to address various bugs, enhance performance, and make improvements based on valuable user feedback.

Better Compatibility and Upgrade Confidence

Our goal with Celery 5.3 is to instill confidence in users who are currently using Celery 4 or older versions. We want to assure you that upgrading to Celery 5.3 will provide a more robust and reliable experience.

Dropped support for Python 3.7

Celery now requires Python 3.8 and above.

Python 3.7 will reach EOL in June, 2023. In order to focus our efforts we have dropped support for Python 3.6 in this version.

If you still require to run Celery using Python 3.7 you can still use Celery 5.2. However we encourage you to upgrade to a supported Python version since no further security patches will be applied for Python 3.7 after the 23th of June, 2023.

Automatic re-connection on connection loss to broker

Unless :setting:broker_connection_retry_on_startup is set to False, Celery will automatically retry reconnecting to the broker after the first connection loss. :setting:broker_connection_retry controls whether to automatically retry reconnecting to the broker for subsequent reconnects.

Since the message broker does not track how many tasks were already fetched before the connection was lost, Celery will reduce the prefetch count by the number of tasks that are currently running multiplied by :setting:worker_prefetch_multiplier. The prefetch count will be gradually restored to the maximum allowed after each time a task that was running before the connection was lost is complete

... (truncated)

Changelog

Sourced from celery's changelog.

5.3.0

:release-date: 2023-06-06 12:00 P.M GMT+6 :release-by: Asif Saif Uddin

• Test kombu 5.3.0 & minor doc update (#8294).
• Update librabbitmq.txt > 2.0.0 (#8292).
• Upgrade syntax to py3.8 (#8281).

.. _version-5.3.0rc2:

5.3.0rc2

:release-date: 2023-05-31 9:00 P.M GMT+6 :release-by: Asif Saif Uddin

• Add missing dependency.
• Fix exc_type being the exception instance rather.
• Fixed revoking tasks by stamped headers (#8269).
• Support sqlalchemy 2.0 in tests (#8271).
• Fix docker (#8275).
• Update redis.txt to 4.5 (#8278).
• Update kombu>=5.3.0rc2.

.. _version-5.3.0rc1:

5.3.0rc1

:release-date: 2023-05-11 4:24 P.M GMT+2 :release-by: Tomer Nosrati

• fix functiom name by @​cuishuang in #8087
• Update CELERY_TASK_EAGER setting in user guide by @​thebalaa in #8085
• Stamping documentation fixes & cleanups by @​Nusnus in #8092
• switch to maintained pyro5 by @​auvipy in #8093
• udate dependencies of tests by @​auvipy in #8095
• cryptography==39.0.1 by @​auvipy in #8096
• Annotate celery/security/certificate.py by @​Kludex in #7398
• Deprecate parse_iso8601 in favor of fromisoformat by @​stumpylog in #8098
• pytest==7.2.2 by @​auvipy in #8106
• Type annotations for celery/utils/text.py by @​max-muoto in #8107
• Update web framework URLs by @​sblondon in #8112
• Fix contribution URL by @​sblondon in #8111
• Trying to clarify CERT_REQUIRED by @​pamelafox in #8113
• Fix potential AttributeError on 'stamps' by @​Darkheir in #8115

... (truncated)

Commits

• 50d4c0b Bump version: 5.3.0rc2 → 5.3.0
• 563a949 added changelog for v5.3.0
• 1656bfc Update README.rst with versions information
• af0b887 Whatsnew in Celery 5.3.0 (#8300)
• 5a2ece4 Update moto version in test.txt
• 60b9945 Update pyro.txt
• d34146f test kombu 5.3.0 & minor doc update (#8294)
• ebd2b6b Minor Update on README.rst
• f3d9e55 Update librabbitmq.txt > 2.0.0 (#8292)
• 4294bde Update auth.txt (#8290)
• Additional commits viewable in compare view

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