build(deps): bump eventlet from 0.29.1 to 0.31.0

Bumps [eventlet](https://github.com/eventlet/eventlet) from 0.29.1 to 0.31.0.
- [Release notes](https://github.com/eventlet/eventlet/releases)
- [Changelog](https://github.com/eventlet/eventlet/blob/master/NEWS)
- [Commits](eventlet/eventlet@v0.29.1...v0.31.0)

---
updated-dependencies:
- dependency-name: eventlet
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -9,7 +9,7 @@ redis==3.5.3
 # TODO: move test dependencies to tests/requirements.txt
 fakeredis==1.6.0
 flask-socketio~=5.1
-eventlet==0.29.1
+eventlet==0.31.0
 dynaconf==3.1.5
 blinker==1.4
 python-dateutil==2.8.2