Update pytest-mock to 1.5.0

[pyup-bot]

There's a new version of pytest-mock available.
You are currently using 1.4.0. I have updated it to 1.5.0

These links might come in handy: PyPI | Changelog | Repo

Changelog

1.5.0

---

• New mocker.mock_module variable points to the underlying mock module being used
  (unittest.mock or mock).
  Thanks blueyed_ for the request (71_).

.. _71: pytest-dev/pytest-mock#71

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[codecov-io]

Current coverage is 98.88% (diff: 100%)

Merging #1419 into master will not change coverage

@@             master      #1419   diff @@
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  Files            30         30          
  Lines          6900       6900          
  Methods           0          0          
  Messages          0          0          
  Branches       1143       1143          
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  Hits           6823       6823          
  Misses           33         33          
  Partials         44         44          

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