build(deps): bump django-environ from 0.10.0 to 0.11.2

Bumps [django-environ](https://github.com/joke2k/django-environ) from 0.10.0 to 0.11.2.
- [Release notes](https://github.com/joke2k/django-environ/releases)
- [Changelog](https://github.com/joke2k/django-environ/blob/main/CHANGELOG.rst)
- [Commits](joke2k/django-environ@v0.10.0...v0.11.2)

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

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

requirements/base.txt

@@ -22,7 +22,7 @@ django-admin-confirm==1.0.0
 django-configurations==2.4
 
 # Django config
-django-environ==0.10.0  # https://github.com/joke2k/django-environ
+django-environ==0.11.2  # https://github.com/joke2k/django-environ
 
 # Spreadsheet generation
 xlsxwriter==3.0.9