Update dependency django to v2.2.6

[renovate]

This PR contains the following updates:

Package	Update	Change
django (source, changelog)	patch	==2.2.4 -> ==2.2.6

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Release Notes

django/django

v2.2.6

Compare Source

v2.2.5

Compare Source

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[codecov-io]

Codecov Report

Merging #53 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop      #53   +/-   ##
========================================
  Coverage    90.39%   90.39%           
========================================
  Files           11       11           
  Lines          177      177           
========================================
  Hits           160      160           
  Misses          17       17

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