Merge #192

192: Update pip to 20.2.4 r=duckinator a=pyup-bot


This PR updates [pip](https://pypi.org/project/pip) from **20.2.3** to **20.2.4**.



<details>
  <summary>Changelog</summary>
  
  
   ### 20.2.4
   ```
   ===================

Deprecations and Removals
-------------------------

- Document that certain removals can be fast tracked. (`8417 &lt;https://github.com/pypa/pip/issues/8417&gt;`_)
- Document that Python versions are generally supported until PyPI usage falls below 5%. (`8927 &lt;https://github.com/pypa/pip/issues/8927&gt;`_)

Features
--------

- New resolver: Avoid accessing indexes when the installed candidate is preferred
  and considered good enough. (`8023 &lt;https://github.com/pypa/pip/issues/8023&gt;`_)
- Improve error message friendliness when an environment has packages with
  corrupted metadata. (`8676 &lt;https://github.com/pypa/pip/issues/8676&gt;`_)
- Cache package listings on index packages so they are guarenteed to stay stable
  during a pip command session. This also improves performance when a index page
  is accessed multiple times during the command session. (`8905 &lt;https://github.com/pypa/pip/issues/8905&gt;`_)
- New resolver: Tweak resolution logic to improve user experience when
  user-supplied requirements conflict. (`8924 &lt;https://github.com/pypa/pip/issues/8924&gt;`_)

Bug Fixes
---------

- New resolver: Correctly respect ``Requires-Python`` metadata to reject
  incompatible packages in ``--no-deps`` mode. (`8758 &lt;https://github.com/pypa/pip/issues/8758&gt;`_)
- New resolver: Pick up hash declarations in constraints files and use them to
  filter available distributions. (`8792 &lt;https://github.com/pypa/pip/issues/8792&gt;`_)
- New resolver: If a package appears multiple times in user specification with
  different ``--hash`` options, only hashes that present in all specifications
  should be allowed. (`8839 &lt;https://github.com/pypa/pip/issues/8839&gt;`_)

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

- Add ux documentation (`8807 &lt;https://github.com/pypa/pip/issues/8807&gt;`_)
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pip
  - Changelog: https://pyup.io/changelogs/pip/
  - Homepage: https://pip.pypa.io/
</details>



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

setup.cfg

@@ -25,7 +25,7 @@ python_requires = >=3.5
 # FIXME: This name seems wrong, but I can't think of a better one atm.
 build =
     bork==5.0.0
-    pip==20.2.3
+    pip==20.2.4
     setuptools==50.3.2
     wheel==0.35.1