Release 6.0

Release 5.0

Release 4.3

Release 4.2

Release 4.1

Release 4.0

(PyPI doesn't allow "Django 2.1" classifier yet)

Release 2.2

Fix typo in Mailgun integration test

(Was causing false failures in ~1/6 of live integration runs,
depending on what order Mailgun generated events.)

Release 2.0