Bump django from 2.2.3 to 2.2.13 (#38)

Bumps [django](https://github.com/django/django) from 2.2.3 to 2.2.13.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.2.3...2.2.13)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 Babel==2.7.0
 Click==7.0
-Django==2.2.3
+Django==2.2.13
 GitPython==2.1.11
 Jinja2==2.10.1
 Markdown==3.1.1