Merge #162

162: Update pip to 20.2.2 r=duckinator a=pyup-bot


This PR updates [pip](https://pypi.org/project/pip) from **20.2.1** to **20.2.2**.



<details>
  <summary>Changelog</summary>
  
  
   ### 20.2.2
   ```
   ===================

Bug Fixes
---------

- Only attempt to use the keyring once and if it fails, don&#39;t try again.
  This prevents spamming users with several keyring unlock prompts when they
  cannot unlock or don&#39;t want to do so. (`8090 &lt;https://github.com/pypa/pip/issues/8090&gt;`_)
- Fix regression that distributions in system site-packages are not correctly
  found when a virtual environment is configured with ``system-site-packages``
  on. (`8695 &lt;https://github.com/pypa/pip/issues/8695&gt;`_)
- Disable caching for range requests, which causes corrupted wheels
  when pip tries to obtain metadata using the feature ``fast-deps``. (`8701 &lt;https://github.com/pypa/pip/issues/8701&gt;`_, `8716 &lt;https://github.com/pypa/pip/issues/8716&gt;`_)
- Always use UTF-8 to read ``pyvenv.cfg`` to match the built-in ``venv``. (`8717 &lt;https://github.com/pypa/pip/issues/8717&gt;`_)
- 2020 Resolver: Correctly handle marker evaluation in constraints and exclude
  them if their markers do not match the current environment. (`8724 &lt;https://github.com/pypa/pip/issues/8724&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

@@ -35,7 +35,7 @@ tests_require =
 [options.extras_require]
 # FIXME: This name seems wrong, but I can't think of a better one atm.
 build =
-    pip==20.2.1
+    pip==20.2.2
     setuptools==49.3.1
     wheel==0.34.2