Merge #50

50: Update pytest to 4.0.2 r=rehandalal a=pyup-bot


This PR updates [pytest](https://pypi.org/project/pytest) from **4.0.1** to **4.0.2**.



<details>
  <summary>Changelog</summary>
  
  
   ### 4.0.2
   ```
   =========================

Bug Fixes
---------

- `4265 &lt;https://github.com/pytest-dev/pytest/issues/4265&gt;`_: Validate arguments from the ``PYTEST_ADDOPTS`` environment variable and the ``addopts`` ini option separately.


- `4435 &lt;https://github.com/pytest-dev/pytest/issues/4435&gt;`_: Fix ``raises(..., &#39;code(string)&#39;)`` frame filename.


- `4500 &lt;https://github.com/pytest-dev/pytest/issues/4500&gt;`_: When a fixture yields and a log call is made after the test runs, and, if the test is interrupted, capture attributes are ``None``.


- `4538 &lt;https://github.com/pytest-dev/pytest/issues/4538&gt;`_: Raise ``TypeError`` for ``with raises(..., match=&lt;non-None falsey value&gt;)``.



Improved Documentation
----------------------

- `1495 &lt;https://github.com/pytest-dev/pytest/issues/1495&gt;`_: Document common doctest fixture directory tree structure pitfalls
   ```
   
  
</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

@@ -1,4 +1,4 @@
 -r requirements.txt
 flake8==3.6.0
-pytest==4.0.1
+pytest==4.0.2
 pytest-cov==2.6.0