TT#69302 Bump django from 1.11.28 to 1.11.29 in /requirements

Bumps [django](https://github.com/django/django) from 1.11.28 to 1.11.29.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/1.11.28...1.11.29)

Signed-off-by: dependabot[bot] <support@github.com>
Closes: https://github.com/sipwise/repoapi/pull/2
Change-Id: Ia2b175655e3dcb4de56f269ddffd95fbbc77e423

requirements/common.txt

@@ -1,5 +1,5 @@
 celery
-Django==1.11.28
+Django==1.11.29
 django-appconf
 django-assets
 django-celery-beat<2.0