Bump gunicorn from 20.0.0 to 20.0.3

[dependabot-preview]

Bumps gunicorn from 20.0.0 to 20.0.3.

Release notes

Sourced from gunicorn's releases.

20.0.3

• fixed load of a config file without a Python extension
• fixed socketfromfd.fromfd when defaults are not set

note: we now warn when we load a config file without Python Extension

20.0.2

• fix changelog

20.0.1

• fixed the way the config module is loaded. __file__ is now available
• fixed wsgi.input_terminated. It is always true.
• use the highest protocol version of openssl by default
• only support Python >= 3.5
• added __repr__ method to Config instance
• fixed support of AIX platform and musl libc in socketfromfd.fromfd function
• fixed support of applications loaded from a factory function
• fixed chunked encoding support to prevent any request smuggling <https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn>_
• Capture os.sendfile before patching in gevent and eventlet workers.
  fix RecursionError.
• removed locking in reloader when adding new files
• load the WSGI application before the loader to pick up all files

note this release add official support for applications loaded from a factory function
as documented in Flask and other places.

Commits

• 50a2cb6 bump to 20.0.3
• 5257d92 changelog for the 20.0.3
• 388fe40 make config doc more explicit
• 0551587 put back configuration file without py extension and deprecate it
• d31ac1d config file extension should be a python extension
• 444b2d8 refactor module
• 3ae3d1c fix linting on python 3.8
• 883e62d socketfromfd: fix cross platform usage
• fa32aa7 socketfromfd: remove python 2 compatibility
• ceca7c8 bump website version
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 77.06% when pulling 588dca1 on dependabot/pip/gunicorn-20.0.3 into 3c263ee on master.

[codecov]

Codecov Report

Merging #139 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #139   +/-   ##
=======================================
  Coverage   71.72%   71.72%           
=======================================
  Files          12       12           
  Lines        1238     1238           
  Branches      174      174           
=======================================
  Hits          888      888           
  Misses        284      284           
  Partials       66       66

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