Merge #96

96: Update pytest to 5.2.1 r=rehandalal a=pyup-bot


This PR updates [pytest](https://pypi.org/project/pytest) from **5.2.0** to **5.2.1**.



<details>
  <summary>Changelog</summary>
  
  
   ### 5.2.1
   ```
   =========================

Bug Fixes
---------

- `5902 &lt;https://github.com/pytest-dev/pytest/issues/5902&gt;`_: Fix warnings about deprecated ``cmp`` attribute in ``attrs&gt;=19.2``.
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pytest
  - Changelog: https://pyup.io/changelogs/pytest/
  - Homepage: https://docs.pytest.org/en/latest/
</details>



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

requirements-dev.txt

@@ -1,3 +1,3 @@
 -r requirements.txt
-pytest==5.2.0
+pytest==5.2.1
 pytest-cov==2.7.1