Merge #74

74: Update pytest-cov to 2.12.0 r=aragilar a=pyup-bot


This PR updates [pytest-cov](https://pypi.org/project/pytest-cov) from **2.11.1** to **2.12.0**.



<details>
  <summary>Changelog</summary>
  
  
   ### 2.12.0
   ```
   -------------------

* Added coverage&#39;s `toml` extra to install requirements in setup.py.
  Contributed by Christian Riedel in `410 &lt;https://github.com/pytest-dev/pytest-cov/pull/410&gt;`_.
* Fixed ``pytest_cov.__version__`` to have the right value (string with version instead of a string
  including ``__version__ =``).
* Fixed license classifier in ``setup.py``.
  Contributed by Chris Sreesangkom in `467 &lt;https://github.com/pytest-dev/pytest-cov/pull/467&gt;`_.
* Fixed *commits since* badge.
  Contributed by Terence Honles in `470 &lt;https://github.com/pytest-dev/pytest-cov/pull/470&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==2.11.1
+pytest-cov==2.12.0