* Fix customer views using wrong csrf middleware
This lead to persistent csrf validation errors if the token from the cookie expired, which could only be solved by clearing cookies.
* Remove unneccesary csrf_protect decorators
* Fix typo
Co-authored-by: Raphael Michel <michel@pretix.eu>
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Co-authored-by: Raphael Michel <michel@pretix.eu>
* 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