Bump requests from 2.22.0 to 2.23.0

Bumps [requests](https://github.com/psf/requests) from 2.22.0 to 2.23.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](psf/requests@v2.22.0...v2.23.0)

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

requirements.txt

@@ -1,3 +1,3 @@
 kinto==13.6.3
 kinto-changes==2.1.1
-requests==2.22.0
+requests==2.23.0