Problem

In bigger organizations or team structures, it is harder to maintain the lists expected in the team-approvers.yml configuration file. For example if there are many individuals, individuals moving around or many join/leave often.

Often times, maintaining such organizational structures are done via organization teams that encapsulate that manual work. However the current implementation expects a list of individual user handlers.

Solution

Adding support for team handlers, as well as flattening them and remove duplicates when assigning / expecting approvals for a specific label

closes #5