pyup: Scheduled weekly dependency update for week 42 (#8598)
* Update pip from 21.2.4 to 21.3
* Update django-filter from 2.4.0 to 21.1
* Update drf-flex-fields from 0.9.3 to 0.9.5
* Update pyyaml from 5.4.1 to 6.0
* Update elasticsearch from 7.14.1 to 7.15.1
* Update selectolax from 0.3.2 to 0.3.5
* Update orjson from 3.6.3 to 3.6.4
* Update pytz from 2021.1 to 2021.3
* Update stripe from 2.60.0 to 2.61.0
* Update regex from 2021.8.28 to 2021.10.8
* Update django-crispy-forms from 1.12.0 to 1.13.0
* Update docker from 5.0.2 to 5.0.3
* Update nltk from 3.6.3 to 3.6.5
* Update django-permissions-policy from 4.2.0 to 4.5.0
* Update pillow from 8.3.2 to 8.4.0
* Update pillow from 8.3.2 to 8.4.0
* Update watchdog from 2.1.5 to 2.1.6
* Update awscli from 1.20.48 to 1.20.63
* Update sphinxemoji from 0.1.9 to 0.2.0
* Update django-dynamic-fixture from 3.1.1 to 3.1.2
* Update pytest-cov from 2.12.1 to 3.0.0
* Update apipkg from 2.0.0 to 2.1.0
* Update mercurial from 5.5 to 5.9.2
* Downgrade some packages
Too recent to test on production
Co-authored-by: Santos Gallegos <stsewd@protonmail.com>