Bump django from 3.0 to 3.0.3

Bumps [django](https://github.com/django/django) from 3.0 to 3.0.3.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.0...3.0.3)

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-Django==3.0
+Django==3.0.3
 django-heroku==0.3.1
 gunicorn==20.0.4
 scanapi==0.0.17