1.0.0 (2020-03-21)

• Add support Django 2.2 and Django 3.0.
• Add support Python 3.7 and Python 3.8.
• Add support for djangorestframework 3.9, 3.10 and 3.11.
• Drop support for Django 2.0 and Django 2.1.
• Drop support for Python 2.7 and Python 3.4.
• Drop support for djangorestframework 3.7.
• Return Content-Type and Content-Length headers with direct download.
• Ensure test coverage of 100%.