Bump django-environ from 0.4.3 to 0.4.4
Bump django-environ from 0.4.3 to 0.4.4

Bumps [django-environ](https://github.com/joke2k/django-environ) from 0.4.3 to 0.4.4.
- [Release notes](https://github.com/joke2k/django-environ/releases/tag/v0.4.4)
- [Commits](https://github.com/joke2k/django-environ/compare/v0.4.3...v0.4.4)
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