Updates an offer

        :param offer_id: the offer id
        :param offer_dict: dict
        :return: dict

def update_offer(self, offer_id, offer_dict):
        """
        Updates an offer

        :param offer_id: the offer id
        :param offer_dict: dict
        :return: dict
        """
        return self._create_put_request(resource=OFFERS, billomat_id=offer_id, send_data=offer_dict)