Merge #207

207: Update setuptools to 51.1.1 r=duckinator a=pyup-bot


This PR updates [setuptools](https://pypi.org/project/setuptools) from **50.3.2** to **51.1.1**.



<details>
  <summary>Changelog</summary>
  
  
   ### 51.1.1
   ```
   -------


Misc
^^^^
* 2525: Avoid hitting network during test_virtualenv.test_test_command.
   ```
   
  
  
   ### 51.1.0
   ```
   -------


Changes
^^^^^^^
* 2486: Project adopts jaraco/skeleton for shared package maintenance.

Misc
^^^^
* 2477: Restore inclusion of rst files in sdist.
* 2484: Setuptools has replaced the master branch with the main branch.
* 2485: Fixed failing test when pip 20.3+ is present.
  -- by :user:`yan12125`
* 2487: Fix tests with pytest 6.2
  -- by :user:`yan12125`
   ```
   
  
  
   ### 51.0.0
   ```
   -------


Breaking Changes
^^^^^^^^^^^^^^^^
* 2435: Require Python 3.6 or later.

Documentation changes
^^^^^^^^^^^^^^^^^^^^^
* 2430: Fixed inconsistent RST title nesting levels caused by 2399
  -- by :user:`webknjaz`
* 2430: Fixed a typo in Sphinx docs that made docs dev section disappear
  as a result of PR 2426 -- by :user:`webknjaz`

Misc
^^^^
* 2471: Removed the tests that guarantee that the vendored dependencies can be built by distutils.
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/setuptools
  - Changelog: https://pyup.io/changelogs/setuptools/
  - Repo: https://github.com/pypa/setuptools
</details>



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

setup.cfg

@@ -26,7 +26,7 @@ python_requires = >=3.5
 build =
     bork==5.1.0
     pip==20.3.3
-    setuptools==50.3.2
+    setuptools==51.1.1
     wheel==0.36.2
 
 # testing and linting are split, to avoid CI problems