Bump requests from 2.16.2 to 2.20.0 in /package

Bumps [requests](https://github.com/requests/requests) from 2.16.2 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@v2.16.2...v2.20.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package/requirements.txt

@@ -3,4 +3,4 @@ cloudshell-shell-core>=3.1.0,<3.2.0
 pywinrm>=0.2.2
 paramiko>=2.1.1
 scpclient>=0.7
-requests==2.16.2
+requests==2.20.0