Bump gunicorn from 19.9.0 to 22.0.0 in /frameworks/Python/api_hour

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 19.9.0 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](https://github.com/benoitc/gunicorn/compare/19.9.0...22.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

frameworks/Python/api_hour/requirements.txt

@@ -4,7 +4,7 @@ aiopg==0.7.0
 -e git+https://github.com/Eyepea/API-Hour.git@577abbdcbb8cc2810dad46e260b338b15db4d0e3#egg=api_hour-master
 asyncio-redis==0.13.4
 chardet==2.3.0
-gunicorn==19.9.0
+gunicorn==22.0.0
 hiredis==0.2.0
 Jinja2==3.1.3
 MarkupSafe==0.23