Epic API missing `created_after` and `updated_after` filters
Problem to solve
Accessing recently created or modified data is an important access pattern, but is not easy using the Epics API.
Although is is possible to manually halt one sufficiently new data is found, pagination headers give no useful feedback about the amount of data a client needs to consume. As a consumer I have no idea if I'm going to need to retrieve 5 epics, or 5000 epics.
updated_before filters to the Epics API for consistency with the Issues API