Bump celery from 4.4.0 to 5.0.2 in /requirements

[dependabot-preview]

Bumps celery from 4.4.0 to 5.0.2.

Release notes

Sourced from celery's releases.

v5.0.2

No release notes provided.

v5.0.1

No release notes provided.

v5.0.0

No release notes provided.

v4.4.7

4.4.7

:release-date: 2020-07-31 11.45 P.M UTC+6:00 :release-by: Asif Saif Uddin

• Add task_received, task_rejected and task_unknown to signals module.
• [ES backend] add 401 as safe for retry.
• treat internal errors as failure.
• Remove redis fanout caveats.
• FIX: -A and --args should behave the same. (#6223)
• Class-based tasks autoretry (#6233)
• Preserve order of group results with Redis result backend (#6218)
• Replace future with celery.five Fixes #6250, and reraise to include
• Fix REMAP_SIGTERM=SIGQUIT not working
• (Fixes#6258) MongoDB: fix for serialization issue (#6259)
• Make use of ordered sets in Redis opt-in
• Test, CI, Docker, style and minor doc impovements.

v4.4.6

No release notes provided.

v4.4.5

https://opencollective.com/celery/updates/celery-4-4-5

v4.4.4

Hotfix release

4.4.3

No release notes provided.

4.4.2

No release notes provided.

4.4.1

Bugfix release with some minor version improvement of kombu and billiard.

Changelog

Sourced from celery's changelog.

5.0.2

release-date

: 2020-11-02 8.00 P.M UTC+2:00

release-by

: Omer Katz

• Fix _autodiscover_tasks_from_fixups (#6424).

• Flush worker prints, notably the banner (#6432).

• Breaking Change: Remove ha_policy from queue definition. (#6440)

  This argument has no effect since RabbitMQ 3.0. Therefore, We feel comfortable dropping it in a patch release.

• Python 3.9 support (#6418).

• Regression: When using the prefork pool, pick the fair scheduling strategy by default (#6447).

• Preserve callbacks when replacing a task with a chain (#6189).

• Fix max_retries override on self.retry() (#6436).

• Raise proper error when replacing with an empty chain (#6452)

5.0.1

release-date

: 2020-10-18 1.00 P.M UTC+3:00

release-by

: Omer Katz

• Specify UTF-8 as the encoding for log files (#6357).
• Custom headers now propagate when using the protocol 1 hybrid messages (#6374).
• Retry creating the database schema for the database results backend in case of a race condition (#6298).
• When using the Redis results backend, awaiting for a chord no longer hangs when setting result_expires to 0 (#6373).
• When a user tries to specify the app as an option for the subcommand, a custom error message is displayed (#6363).
• Fix the --without-gossip, --without-mingle, and --without-heartbeat options which now work as expected. (#6365)
• Provide a clearer error message when the application cannot be loaded.
• Avoid printing deprecation warnings for settings when they are loaded from Django settings (#6385).
• Allow lowercase log levels for the --loglevel option (#6388).
• Detaching now works as expected (#6401).
• Restore broadcasting messages from celery control (#6400).
• Pass back real result for single task chains (#6411).
• Ensure group tasks a deeply serialized (#6342).
• Fix chord element counting (#6354).
• Restore the celery shell command (#6421).

Commits

• f50cf7d Bump version: 5.0.1 → 5.0.2
• 8bed67c Update changelog.
• 6cf4f40 Raise proper error when replacing with an empty chain. (#6452)
• 8fee0bf Happify linter.
• 0833a27 Fix max_retries override on self.retry (#6436)
• f1145a2 Fix minor documentation omission (#6453)
• 56fc486 Preserve callbacks when replacing a task with a chain (#6189)
• 0db172e fix: Ensure default fairness maps to SCHED_FAIR (#6447)
• 70dc29e move to travis-ci.com
• 7c3da03 docs: fix celery beat settings
• Additional commits viewable in compare view

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