Bump django-storages from 1.11.1 to 1.12.3

Bumps [django-storages](https://github.com/jschneier/django-storages) from 1.11.1 to 1.12.3.
- [Release notes](https://github.com/jschneier/django-storages/releases)
- [Changelog](https://github.com/jschneier/django-storages/blob/master/CHANGELOG.rst)
- [Commits](jschneier/django-storages@1.11.1...1.12.3)

---
updated-dependencies:
- dependency-name: django-storages
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -13,7 +13,7 @@ Django==2.2.27
 django-appconf==1.0.5
 django-base64field==1.0
 django-cryptography==1.0
-django-storages==1.11.1
+django-storages==1.12.3
 djangorestframework==3.9.2
 et-xmlfile==1.1.0
 idna==3.3