* Rename confusingly named helpers for URL generation
* new name
* fix old call
* Revert "new name"
This reverts commit a6e9a488b62b9bc7c2800c402e432765a838cbc6.
* New name
* Upgrade Django to 3.0 and other dependencies to recent versions
* Fix otp version contsraint
* Remove six dependency
* Resolve some warnings
* Fix failing tests
* Update django-countries
* Resolve all RemovedInDjango31Warnings in test suite
* Run isort
* Fix import
* Update PostgreSQL version on travis