Bump requests from 2.14.2 to 2.20.0

Bumps [requests](https://github.com/requests/requests) from 2.14.2 to 2.20.0.
- [Release notes](https://github.com/requests/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](psf/requests@v2.14.2...v2.20.0)

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

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
 beautifulsoup4==4.6.0
-requests==2.14.2
+requests==2.20.0
 six==1.10.0