Update celery requirement from ~=4.4.2 to ~=4.4.6 in /config

[dependabot-preview[bot]]

Updates the requirements on celery to permit the latest version.

Changelog

Sourced from celery's changelog.

4.4.6

release-date

: 2020-06-24 2.40 P.M UTC+6:00

release-by

: Asif Saif Uddin

• Remove autoscale force_scale methods (#6085).
• Fix autoscale test
• Pass ping destination to request
• chord: merge init options with run options
• Put back KeyValueStoreBackend.set method without state
• Added --range-prefix option to celery multi (#6180)
• Added as_list function to AsyncResult class (#6179)
• Fix CassandraBackend error in threads or gevent pool (#6147)
• Kombu 4.6.11

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).

Commits

• ea96475 v4.4.6
• 16d9297 changelog for v4.4.6
• c5843a5 Fix CassandraBackend error in threads or gevent pool (#6147)
• 877f4bc Added as_list function to AsyncResult class (#6179)
• 29444f1 added --range-prefix option to celery multi (#6180)
• 1a0ca99 put back KeyValueStoreBackend.set method without state
• b7436f2 chord: merge init options with run options
• 93e000d Fix autoscale test
• f8e3df6 Pass ping destination to request
• 0715118 Remove autoscale force_scale methods (#6085)
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #254.