Merge #6

6: Update pytest to 6.1.0 r=aragilar a=pyup-bot


This PR updates [pytest](https://pypi.org/project/pytest) from **5.2.1** to **6.1.0**.



*The bot wasn't able to find a changelog for this release. [Got an idea?](https://github.com/pyupio/changelogs/issues/new)*

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



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

test-requirements.txt

@@ -1,2 +1,2 @@
-pytest==5.2.1
+pytest==6.1.0
 pytest-cov==2.10.1