Update pytest-mock to 1.12.1

[pyup-bot]

This PR updates pytest-mock from 1.11.2 to 1.12.1.

Changelog

1.12.1

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

* Fix error if ``mocker.patch`` is used in code where the source file
is not available, for example stale ``.pyc`` files (`169`_).

.. _169: https://github.com/pytest-dev/pytest-mock/issues/169issuecomment-555729265

1.12.0

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

* Now all patch functions also raise a ``ValueError`` when used
as a context-manager. Thanks `AlexGascon`_ for the PR (`168`_).

.. _AlexGascon: https://github.com/AlexGascon
.. _168: https://github.com/pytest-dev/pytest-mock/pull/168

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 #37