build(deps): bump celery from 4.4.7 to 5.0.0 in /src/karmen_backend

[dependabot-preview]

Bumps celery from 4.4.7 to 5.0.0.

Changelog

Sourced from celery's changelog.

5.0.0

release-date

: 2020-09-24 6.00 P.M UTC+3:00

release-by

: Omer Katz

• Breaking Change Remove AMQP result backend (#6360).
• Warn when deprecated settings are used (#6353).
• Expose retry_policy for Redis result backend (#6330).
• Prepare Celery to support the yet to be released Python 3.9 (#6328).

5.0.0rc3

release-date

: 2020-09-07 4.00 P.M UTC+3:00

release-by

: Omer Katz

• More cleanups of leftover Python 2 support (#6338).

5.0.0rc2

release-date

: 2020-09-01 6.30 P.M UTC+3:00

release-by

: Omer Katz

• Bump minimum required eventlet version to 0.26.1.
• Update Couchbase Result backend to use SDK V3.
• Restore monkeypatching when gevent or eventlet are used.

5.0.0rc1

release-date

: 2020-08-24 9.00 P.M UTC+3:00

Commits

• 5e05400 Happify linters.
• a99a903 Bump version: 5.0.0rc3 → 5.0.0
• 661f6b1 Complete release notes.
• 67052f3 pyupgrade.
• 1c6be61 Mention ordered group results are now the default.
• c0b158d Fix phrasing.
• be8547e Mention retry policy for the redis result backend.
• 518bf9f Mention the new pytest-celery plugin.
• 1b01683 PyPy 3.7 is currently in alpha.
• d1b5965 isort.
• Additional commits viewable in compare view

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Superseded by #438.