www/py-django-constance: 1.2.1 -> 1.3.3

• BACKWARD INCOMPATIBLE Dropped support for Django < 1.8).
• Added ordering constance fields using OrderedDict
• Added a signal when updating constance fields
• Improved the signal path to avoid import errors
• Improved the admin layout when using fieldsets

PR: 213193
Submitted by: Ultima1252@gmail.com (maintainer)