Bump django from 1.11.28 to 1.11.29

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

Signed-off-by: dependabot[bot] <support@github.com>

2.7-test-requirements.txt

@@ -12,7 +12,7 @@ configparser==3.7.4       # via importlib-metadata
 contextlib2==0.5.5        # via importlib-metadata
 click==7.0                # via flask
 coverage==4.3.4
-django==1.11.28
+django==1.11.29
 flask==1.0.3
 freezegun==0.3.12         # via pytest-freezegun
 funcsigs==1.0.2           # via mock, pytest