Bump requests from 2.18.4 to 2.20.0

Bumps [requests](https://github.com/psf/requests) from 2.18.4 to 2.20.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](psf/requests@v2.18.4...v2.20.0)

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

Author: dependabot[bot]

requirements.txt

@@ -2,6 +2,6 @@ pytesseract==0.2.5
 psutil==5.4.7
 threadpool==1.3.2
 web.py==0.40.dev0
-requests==2.18.4
+requests==2.20.0
 Pillow==5.3.0
 beautifulsoup4==4.6.3