RDMO 2.2.1

[jochenklar]

• Fix import error when allauth is not used (Update 2.1.3 to 2.2.0 failed with Shibboleth enabled and allauth disabled #1145)
• Fix a bug with collection pages when optionset refresh is true (Option set provider with refresh enabled inside a collection prevents switchig between tabs / collections #1147)
• Prevent the page to change when a validation error occurs on project_questions (Answer overwritten when multiple users edit the same question #1134)
• Pin importlib_metadata to 0.8.4 due to an upstream problem

[coveralls]

coverage: 90.478% (+0.003%) from 90.475%
when pulling 2a245da on 2.2.1
into a9772a0 on main.