🔖 Thalia Website v1.13

Errors resolved

• Fix migration containing datetime (!657 (merged)) events
• Filter the inline committee memberships (!655 (merged)) activemembers
• Fix missing migration (!650 (merged))
• Fix event cancellation (!697 (merged))

New functionality

• Add field for pizza events to the Event serializer (!687 (merged)) events api pizzas
• Add text about mailing the paparazcie for a full resolution photo (!686 (merged))
• Add photos API (!671 (merged)) photos
• Show cancellation dates in event admin (!659 (merged)) events
• Enable booksale to freshmen before 01-09 (!654 (merged), !691 (merged)) education
• Make partner optional for PartnerEvents (!653 (merged), !692 (merged)) partners

Technical changes

• Update requirements and fix icon generation in fixtures (!688 (merged))
• Lower case username in token API (!678 (merged), !690 (merged))
• Clean up registrations code smell (!675 (merged)) refactor
• Use docker container from own namespace (!670 (merged))
• Add constraints to the members app (!658 (merged)) members
• Publicly show 'for members' menu-item (!656 (merged))
• Change images for django20 tests in CI (!651 (merged))
• Use anonymous volume to cache docs build if not mounted (!647 (merged))
• Check for docs changes (!643 (merged)) testing
• Django 2 (!627 (merged), !652 (merged), !672 (merged), !699 (merged))