[Security] Bump django from 2.1.2 to 2.2

[dependabot-preview]

Bumps django from 2.1.2 to 2.2. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Low severity vulnerability that affects django
In Django 1.11.x before 1.11.18, 2.0.x before 2.0.10, and 2.1.x before 2.1.5, an Improper Neutralization of Special Elements in Output Used by a Downstream Component issue exists in django.views.defaults.page_not_found(), leading to content spoofing (in a 404 error page) if a user fails to recognize that a crafted URL has malicious content.

Affected versions: >= 2.1.0, < 2.1.5

Sourced from The GitHub Security Advisory Database.

Memory exhaustion in django.utils.numberformat.format()
If django.utils.numberformat.format() -- used by contrib.admin as well as the the floatformat, filesizeformat, and intcomma templates filters -- received a Decimal with a large number of digits or a large exponent, it could lead to significant memory usage due to a call to '{:f}'.format().

Affected versions: >= 1.11.0, < 1.11.19; >= 2.0.0, < 2.0.11; >= 2.1.0, < 2.1.6

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects django
Django 1.11.x before 1.11.19, 2.0.x before 2.0.11, and 2.1.x before 2.1.6 allows Uncontrolled Memory Consumption via a malicious attacker-supplied value to the django.utils.numberformat.format() function.

Affected versions: >= 2.1.0, < 2.1.6

Commits

• 635d53a [2.2.x] Bumped version number for 2.2 release.
• bc6f1da [2.2.x] Set release date in v2.2 release notes.
• 5427148 [2.2.x] Updated man page for 2.2 final.
• 7090cbf [2.2.x] Updated contrib translations from Transifex
• 98f526e [2.2.x] Updated core translations from Transifex
• 917aa55 [2.2.x] Fixed #30289 -- Prevented admin inlines for a ManyToManyField's impli...
• de62ba9 [2.2.x] Added stub 2.1.8 release notes.
• fc708f3 [2.2.x] Refs #30278 -- Fixed link in cached_property docs.
• f141704 [2.2.x] Refs #30278 -- Doc'd behavior of del on an unaccessed cached_property.
• 4a7bbac [2.2.x] Fixed #30265 -- Fixed a tutorial number in Reusable App tutorial.
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #114.