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](https://github.com/psf/requests/compare/v2.22.0...v2.23.0)

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

requirements.txt

@@ -1,10 +1,10 @@
 Mastodon.py==1.5.0
 markovify==0.8.0
 beautifulsoup4==4.8.2
-requests==2.22.0
+requests==2.23.0
 Flask==1.1.1
 flask-mysqldb==0.2.0
 bcrypt == 3.1.7
-requests==2.22.0
+requests==2.23.0
 http-ece==1.1.0
 cryptography==2.8