Bump django from 1.11.17 to 1.11.29 in /src

Bumps [django](https://github.com/django/django) from 1.11.17 to 1.11.29.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@1.11.17...1.11.29)

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

Author: dependabot[bot]

src/requirements.txt

@@ -6,7 +6,7 @@ cfe==0.0.15
 chardet==3.0.4
 dj-database-url==0.4.2
 django-storages==1.6.5
-django==1.11.17
+django==1.11.29
 docutils==0.14
 gitdb2==2.0.3
 gitpython==2.1.7