Merge pull request #13 from praveen-manohar/dependabot/pip/gunicorn-22.0.0

Bump gunicorn from 20.0.4 to 22.0.0

Author: praveen-manohar

requirements.txt

@@ -3,7 +3,7 @@ certifi==2020.4.5.1
 chardet==3.0.4
 click==7.1.2
 Flask==1.1.2
-gunicorn==20.0.4
+gunicorn==22.0.0
 idna==2.9
 itsdangerous==1.1.0
 Jinja2==2.11.3