Update pytest-mock to 1.11.1

[pyup-bot]

This PR updates pytest-mock from 1.10.4 to 1.11.1.

Changelog

1.11.1

-------------------

* Fix ``mocker.spy`` on Python 2 when used on non-function objects
which implement ``__call__`` (`157`_). Thanks `pbasista`_  for
the report.

.. _157: https://github.com/pytest-dev/pytest-mock/issues/157
.. _pbasista: https://github.com/pbasista

1.11.0

------

* The object returned by ``mocker.spy`` now also tracks the return value
of the spied method/function.

Links

• PyPI: https://pypi.org/project/pytest-mock
• Changelog: https://pyup.io/changelogs/pytest-mock/
• Repo: https://github.com/pytest-dev/pytest-mock/

[pyup-bot]

Closing this in favor of #120