Merge #78

78: Update pytest-cov to 2.12.1 r=aragilar a=pyup-bot


This PR updates [pytest-cov](https://pypi.org/project/pytest-cov) from **2.12.0** to **2.12.1**.



<details>
  <summary>Changelog</summary>
  
  
   ### 2.12.1
   ```
   -------------------

* Changed the `toml` requirement to be always be directly required (instead of being required through a coverage extra).
  This fixes issues with pip-compile (`pip-tools1300 &lt;https://github.com/jazzband/pip-tools/issues/1300&gt;`_).
  Contributed by Sorin Sbarnea in `472 &lt;https://github.com/pytest-dev/pytest-cov/pull/472&gt;`_.
* Documented ``show_contexts``.
  Contributed by Brian Rutledge in `473 &lt;https://github.com/pytest-dev/pytest-cov/pull/473&gt;`_.
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pytest-cov
  - Changelog: https://pyup.io/changelogs/pytest-cov/
  - Repo: https://github.com/pytest-dev/pytest-cov
</details>



Co-authored-by: pyup-bot <github-bot@pyup.io>

test-requirements.txt

@@ -1,2 +1,2 @@
 pytest==6.2.4
-pytest-cov==2.12.0
+pytest-cov==2.12.1