Bump django in /{{cookiecutter.github_repository_name}}

Bumps [django](https://github.com/django/django) from 2.2.10 to 2.2.18.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.2.10...2.2.18)

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

{{cookiecutter.github_repository_name}}/requirements.txt

@@ -1,6 +1,6 @@
 # Core
 pytz==2019.1  # django dependency
-Django==2.2.10
+Django==2.2.18
 utils2devops>=0.1.4  # the latest alway
 
 # Storages