* 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
* Autocheckin data model/cosmetics
* Expose automatically checked-in OrderPositions
* Expose automatically checked-in OrderPositions in CSV/PDF Exports
* Fix some tests, try to fix MultiStringField/CheckboxSelectMultiple
* Actually fix MultiStringField/CheckboxSelectMultiple.
(Not pretty, but it works)
* Fix more tests
* Squash migration
* Also fix CSV/nameparts-test
* Changes for Autocheckin code-review
* Perform Auto-Checkins through new core plugin
* Update config-doc to reflect also checkinlists
* Explicitly output AutoCheckin Yes/No for CSV-Export (+ fix test)
* Move autocheckin from plugin to service
* API-doc
* Fix API-doc spelling
* Checkinlist-API and autocheckin order tests
* Performance improvement when reading checkinlists for autocheckin
Co-Authored-By: Raphael Michel <michel@rami.io>
* Autocheckin test for order created through API
* Resolve migration conflict
* Data model and migration
* Some backwards compatibility
* CRUD for checkin lists
* Show and perform checkins
* Correct numbers in table and dashboard widget
* event creation and cloning
* Allow to link specific exports and pass options per query
* Play with the CSV export
* PDF export
* Collapse exports by default
* Improve PDF exporter
* Addon stuff
* Subevent stuff, pretixdroid tests
* pretixdroid tests
* Add CRUD API
* Test compatibility
* Fix test
* DB-independent sorting behavior
* Add CRUD and coyp tests
* Re-enable pretixdroid plugin
* pretixdroid config
* Tests & fixes
