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This is a hard task

For this task you need to update django to latest version of django 3 in the openwisp-utils repository.

You may look at this page for a lot information regarding this change: https://docs.djangoproject.com/en/3.0/releases/3.0/

Deliverables:

• Pull request on openwisp-utils updating the requirements
• Travis tests should be passing on your pull request