Update the current :class:`InstanceResource`

def update(self, **args):
        """
        Update the current :class:`InstanceResource`
        """
        self_dict = self.to_dict()
        if args:
            self_dict = dict(list(self_dict.items()) + list(args.items()))
        response = self.requester.put(
            '/{endpoint}/{id}', endpoint=self.endpoint,
            id=self.id, payload=self_dict
        )
        obj_json = response.json()
        if 'version' in obj_json:
            self.__dict__['version'] = obj_json['version']
        return self