What's Changed
* Merge master into develop by geophphrie in https://github.com/ambitioninc/ambition-utils/pull/104
* Celery upgrade (testing requirement only) by geophphrie in https://github.com/ambitioninc/ambition-utils/pull/105
* Adjust migration by geophphrie in https://github.com/ambitioninc/ambition-utils/pull/103
* Don't Reset next_occurrence For Cloned Objects by tylerneu in https://github.com/ambitioninc/ambition-utils/pull/108
* Merge Master by tylerneu in https://github.com/ambitioninc/ambition-utils/pull/109
* 3.1.12 by tylerneu in https://github.com/ambitioninc/ambition-utils/pull/110
* Fix possible null value comparison against a date by somewes in https://github.com/ambitioninc/ambition-utils/pull/111
* Merge master into develop and fix conflicts by somewes in https://github.com/ambitioninc/ambition-utils/pull/113
* 3.1.13 by somewes in https://github.com/ambitioninc/ambition-utils/pull/112
**Full Changelog**: https://github.com/ambitioninc/ambition-utils/compare/3.1.11...3.1.13