Update pytest to 3.7.4 (#10)

This PR updates [pytest](https://pypi.org/project/pytest) from **3.7.2** to **3.7.4**.



<details>
  <summary>Changelog</summary>
  
  
   ### 3.7.4
   ```
   =========================

Bug Fixes
---------

- `3506 &lt;https://github.com/pytest-dev/pytest/issues/3506&gt;`_: Fix possible infinite recursion when writing ``.pyc`` files.


- `3853 &lt;https://github.com/pytest-dev/pytest/issues/3853&gt;`_: Cache plugin now obeys the ``-q`` flag when ``--last-failed`` and ``--failed-first`` flags are used.


- `3883 &lt;https://github.com/pytest-dev/pytest/issues/3883&gt;`_: Fix bad console output when using ``console_output_style=classic``.


- `3888 &lt;https://github.com/pytest-dev/pytest/issues/3888&gt;`_: Fix macOS specific code using ``capturemanager`` plugin in doctests.



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

- `3902 &lt;https://github.com/pytest-dev/pytest/issues/3902&gt;`_: Fix pytest.org links
   ```
   
  
  
   ### 3.7.3
   ```
   =========================

Bug Fixes
---------

- `3033 &lt;https://github.com/pytest-dev/pytest/issues/3033&gt;`_: Fixtures during teardown can again use ``capsys`` and ``capfd`` to inspect output captured during tests.


- `3773 &lt;https://github.com/pytest-dev/pytest/issues/3773&gt;`_: Fix collection of tests from ``__init__.py`` files if they match the ``python_files`` configuration option.


- `3796 &lt;https://github.com/pytest-dev/pytest/issues/3796&gt;`_: Fix issue where teardown of fixtures of consecutive sub-packages were executed once, at the end of the outer
  package.


- `3816 &lt;https://github.com/pytest-dev/pytest/issues/3816&gt;`_: Fix bug where ``--show-capture=no`` option would still show logs printed during fixture teardown.


- `3819 &lt;https://github.com/pytest-dev/pytest/issues/3819&gt;`_: Fix ``stdout/stderr`` not getting captured when real-time cli logging is active.


- `3843 &lt;https://github.com/pytest-dev/pytest/issues/3843&gt;`_: Fix collection error when specifying test functions directly in the command line using ``test.py::test`` syntax together with ``--doctest-modules``.


- `3848 &lt;https://github.com/pytest-dev/pytest/issues/3848&gt;`_: Fix bugs where unicode arguments could not be passed to ``testdir.runpytest`` on Python 2.


- `3854 &lt;https://github.com/pytest-dev/pytest/issues/3854&gt;`_: Fix double collection of tests within packages when the filename starts with a capital letter.



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

- `3824 &lt;https://github.com/pytest-dev/pytest/issues/3824&gt;`_: Added example for multiple glob pattern matches in ``python_files``.


- `3833 &lt;https://github.com/pytest-dev/pytest/issues/3833&gt;`_: Added missing docs for ``pytester.Testdir``.


- `3870 &lt;https://github.com/pytest-dev/pytest/issues/3870&gt;`_: Correct documentation for setuptools integration.



Trivial/Internal Changes
------------------------

- `3826 &lt;https://github.com/pytest-dev/pytest/issues/3826&gt;`_: Replace broken type annotations with type comments.


- `3845 &lt;https://github.com/pytest-dev/pytest/issues/3845&gt;`_: Remove a reference to issue `568 &lt;https://github.com/pytest-dev/pytest/issues/568&gt;`_ from the documentation, which has since been
  fixed.
   ```
   
  
</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>

requirements.txt

@@ -3,6 +3,6 @@ jsonschema==2.6.0
 GitPython==2.1.11
 mistune==0.8.3
 flake8==3.5.0
-pytest==3.7.2
+pytest==3.7.4
 coveralls>=1.2.0
 requests==2.19.1