Fix deprecation warning of the form:
Fix deprecation warning of the form:

PendingDeprecationWarning: generator 'EventListManager.occurrences_after' raised StopIteration

See:

https://docs.python.org/3/whatsnew/3.5.html#pep-479-change-stopiteration-handling-inside-generators

sprightco/django-scheduler,drodger/django-scheduler,llazzaro/django-scheduler,drodger/django-scheduler,drodger/django-scheduler,sprightco/django-scheduler,llazzaro/django-scheduler,llazzaro/django-scheduler,sprightco/django-scheduler