same to NewIssueState, we can determine the detailed event type from
latest pull state
Signed-off-by: Seongmin Lee git@boltless.me
NewPullClosed/Merged/Reopen to NewPullState
#711
same to NewIssueState, we can determine the detailed event type from
latest pull state
Signed-off-by: Seongmin Lee git@boltless.me