Add author_is_only_contributor predicate (#77)
This predicate applies if the pull request author is the only author and committer of commits in the pull request. It's useful in conjunction with has_author_in to reduce or increase the approval required for specific authors only when no other users have added commits to the same branch.
Retry loading data if initial response is missing information (#78)
This is a workaround for a GitHub API issue where new information about a pull request is sometimes not available at the time the pull_request webhook event is received.