TT#69302 Bump django from 1.11.17 to 1.11.23 (security update)

Bumps [django](https://github.com/django/django) from 1.11.17 to 1.11.23.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/1.11.17...1.11.23)

Signed-off-by: dependabot[bot] <support@github.com>
Closes: https://github.com/sipwise/repoapi/pull/1

Change-Id: I4013e91332f38ed48da6d283ff589c5b42ab3364

requirements/common.txt

@@ -1,4 +1,4 @@
-Django==1.11.17
+Django==1.11.23
 django-extensions
 yuicompressor
 django-assets