Bump django from 1.11.10 to 1.11.29

Bumps [django](https://github.com/django/django) from 1.11.10 to 1.11.29.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@1.11.10...1.11.29)

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

requirements.txt

@@ -1,4 +1,4 @@
-Django==1.11.10
+Django==1.11.29
 django-crispy-forms==1.7.2
 django-model-utils==3.1.1
 Pillow==5.0.0