Bump django from 2.2.3 to 2.2.8

Created by: dependabot[bot]

Bumps django from 2.2.3 to 2.2.8.

Commits

• b8782c5 [2.2.x] Bumped version for 2.2.8 release.
• d6fa509 [2.2.x] Added release dates for 2.1.15, 2.2.8 and 3.0.
• 36f580a Fixed CVE-2019-19118 -- Required edit permissions on parent model for editabl...
• 70311e1 [2.2.x] Refs #30953 -- Added 2.1.15 release note for 0107e3d1058f653f66032f7f...
• 6cf3b6f [2.2.x] Fixed #30953 -- Made select_for_update() lock queryset's model when u...
• 9a17ae5 [2.2.x] Fixed #31021 -- Fixed proxy model permissions data migration crash wi...
• 019a1b9 [2.2.x] Fixed #31029 -- Used more specific links to RFCs.
• 57f5a7e [2.2.x] Refs #31029 -- Added note about :rfc: role in writing documentation d...
• 3cf70df [2.2.x] Fixed #31018 -- Removed django-nonrel in NoSQL databases FAQ.
• e82a1bc [2.2.x] Improved custom MultiWidget example in docs.
• Additional commits viewable in compare view

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