Bump requests from 2.22.0 to 2.25.1 (#357)

Bumps [requests](https://github.com/psf/requests) from 2.22.0 to 2.25.1.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](psf/requests@v2.22.0...v2.25.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -52,7 +52,7 @@ pysafebrowsing==0.1.1
 PySocks==1.7.1
 python-magic==0.4.15
 pytz==2019.2
-requests==2.22.0
+requests==2.25.1
 s3transfer==0.2.1
 smmap2==2.0.5
 sqlparse==0.2.4