Bump requests from 2.20.4 to 2.22.0

Bumps [requests](https://github.com/requests/requests) from 2.20.4 to 2.22.0.
- [Release notes](https://github.com/requests/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](https://github.com/requests/requests/commits/v2.22.0)

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

Author: dependabot[bot]

requirements.txt

@@ -26,7 +26,7 @@ pykerberos==1.1.14
 pyOpenSSL==17.5.0
 pyxdg==0.26
 PyYAML==5.3
-requests==2.20.4
+requests==2.22.0
 SecretStorage==2.3.1
 simplejson==3.13.2
 six==1.11.0