Update dependency django-ipware to v6

See merge request !1349

Resolve "Recurrence field does not work when yearly option is selected"

Closes #939

See merge request !1358

Update dependency django-maintenance-mode to ^0.20.0

See merge request !1364

Update dependency django-colorfield to ^0.11.0

See merge request !1363

Merge branch '927-after-editing-an-oauth-application-an-aleksis-matrjoschka-situation-occurs' into 'master'

Resolve "After editing an OAuth application, an AlekSIS Matrjoschka situation occurs"

Closes #927

See merge request !1356

Optimize request handling with calendar events and fix typing

See merge request !1359

Resolve "Deleting persons is too easy"

Closes #669

See merge request !1357

Resolve "Remove Yubikey support"

Closes #876

See merge request !1336

Resolve "Make calendar type select button group mandatory"

Closes #944

See merge request !1355

Resolve "Improve design of cancelled/replaced calendar events"

Closes #890

See merge request !1351

Set mutation fields explicitly

See merge request !1353

Resolve "Events on last day of range to be fetched are not fetched"

Closes #931

See merge request !1348

This reverts commit aa85db6b

Optimize tox for speed with linting/reformatting

See merge request !1338