Merge #68

68: Update eventlet to 0.29.1 r=duckinator a=pyup-bot


This PR updates [eventlet](https://pypi.org/project/eventlet) from **0.28.0** to **0.29.1**.



<details>
  <summary>Changelog</summary>
  
  
   ### 0.29.1
   ```
   ======
patcher: [py27] recursion error in pytest/python2.7 installing register_at_fork eventlet/eventlet#660
patcher: monkey_patch(builtins=True) failed on py3 because `file` class is gone eventlet/eventlet#541
don&#39;t crash on PyPy 7.0.0 eventlet/eventlet#547
Only install monotonic on python2 eventlet/eventlet#583
   ```
   
  
  
   ### 0.29.0
   ```
   ======
* ssl: context wrapped listener fails accept() eventlet/eventlet#651
   ```
   
  
  
   ### 0.28.1
   ```
   ======
* Sorry, Eventlet was broken on Windows for versions 0.27-0.28
  patcher: no os.register_at_fork on Windows (654)
* Clean up TypeError in __del__
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/eventlet
  - Changelog: https://pyup.io/changelogs/eventlet/
  - Homepage: http://eventlet.net
</details>



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

requirements.txt

@@ -1,6 +1,6 @@
 cherrypy==18.6.0
 jinja2==2.11.2
 gunicorn==20.0.4
-eventlet==0.28.0
+eventlet==0.29.1
 pillow==7.2.0
 elasticsearch>=7.7.0,<8.0.0