Sends the RESUME packet.

async def resume(self):
        """Sends the RESUME packet."""
        payload = {
            'op': self.RESUME,
            'd': {
                'seq': self.sequence,
                'session_id': self.session_id,
                'token': self.token
            }
        }

        await self.send_as_json(payload)
        log.info('Shard ID %s has sent the RESUME payload.', self.shard_id)