Bump django from 1.5.12 to 1.11.22

[dependabot[bot]]

Bumps django from 1.5.12 to 1.11.22.

Commits

• 480380c [1.11.x] Bumped version for 1.11.22 release.
• 32124fc [1.11.x] Fixed CVE-2019-12781 -- Made HttpRequest always trust SECURE_PROXY_S...
• 58553bb [1.11.x] Added stub release notes for security releases.
• bc5febe [1.11.x] Fixed GeoIPTest.test04_city() failure with the latest GeoIP2 database.
• 7906968 [1.11.x] Bumped minimum ESLint version to 4.18.2.
• 341f444 [1.11.x] Added CVE-2019-12308 to the security release archive.
• 9f8bed5 [1.11.x] Added CVE-2019-11358 to the security release archive.
• a07ce0e [1.11.x] Fixed typo in 1.11.21 release notes.
• 2f67c8e [1.11.x] Post-release version bump.
• bc1f79d [1.11.x] Bumped version for 1.11.21 release.
• Additional commits viewable in compare view

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