Changes
* Add person-to-person and group-to-group recurrence calculations (84) marius-mather
:package: Dependencies
* Bump sphinx-click from 3.1.0 to 4.0.3 (82) dependabot
* Bump sphinx-click from 3.1.0 to 4.0.3 in /docs (78) dependabot
* Bump xdoctest from 0.15.10 to 1.0.0 (62) dependabot
* Bump codecov/codecov-action from 2.1.0 to 3.1.0 (79) dependabot
* Bump sphinx from 4.4.0 to 4.5.0 in /docs (63) dependabot