message: fixed mutation test example
diff: @@ -88,7 +88,7 @@ it('triggers a mutation', () => {
  wrapper.find('button').simulate('click');
  expect(mockClient.executeMutation).toBeCalledTimes(1);
  - expect(mockClient.executeMutation).toBeCalledWith(expect.objectContaining({ variables }));
  + expect(mockClient.executeMutation).toBeCalledWith(expect.objectContaining({ variables }), {});
  });
  ```
  