Merge pull request #1780 from c2corg/dependabot/pip/gunicorn-22.0.0

chore(deps): bump gunicorn from 21.2.0 to 22.0.0

Author: brunobesson

requirements.txt

@@ -31,7 +31,7 @@ SQLAlchemy==1.3.24
 transaction==4.0
 waitress==3.0.0
 zope.sqlalchemy==3.1
-gunicorn==21.2.0
+gunicorn==22.0.0
 
 # ColanderAlchemy>=0.3.2
 # needed for ColanderAlchemy: https://github.com/stefanofontanelli/ColanderAlchemy/pull/90