Update celery requirement from ~=4.4.2 to ~=4.4.5 in /config

[dependabot-preview]

Updates the requirements on celery to permit the latest version.

Release notes

Sourced from celery's releases.

v4.4.5

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

Changelog

Sourced from celery's changelog.

4.4.5

release-date

: 2020-06-08 12.15 P.M UTC+6:00

release-by

: Asif Saif Uddin

• Add missing dependency on future (#6146).
• ElasticSearch: Retry index if document was deleted between index
• fix windows build
• Customize the retry interval of chord_unlock tasks
• fix multi tests in local

4.4.4

release-date

: 2020-06-03 11.00 A.M UTC+6:00

release-by

: Asif Saif Uddin

• Fix autoretry_for with explicit retry (#6138).
• Kombu 4.6.10
• Use Django DB max age connection setting (fixes #4116).
• Add retry on recoverable exception for the backend (#6122).
• Fix random distribution of jitter for exponential backoff.
• ElasticSearch: add setting to save meta as json.
• fix #6136. celery 4.4.3 always trying create /var/run/celery directory.
• Add task_internal_error signal (#6049).

4.4.3

release-date

: 2020-06-01 4.00 P.M UTC+6:00

release-by

: Asif Saif Uddin

• Fix backend utf-8 encoding in s3 backend .
• Kombu 4.6.9

... (truncated)

Commits

• d36835e v4.4.5
• 23a10bc changelog v4.4.5
• 45ad3bd Customize the retry interval of chord_unlock tasks
• ce478cf fix multi tests in local
• 4e2a59a fix flake8 error
• 8084786 fix windows build
• 6b05344 Specify minimum version of Sphinx for Celery extension (#6150)
• 12a643c ElasticSearch: Retry index if document was deleted between index and update (...
• 60b6134 Add missing dependency on future (#6146)
• 9d183d3 v4.4.4
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #249.