build(deps): bump eventlet from 0.25.2 to 0.30.2

Bumps [eventlet](https://github.com/eventlet/eventlet) from 0.25.2 to 0.30.2.
- [Release notes](https://github.com/eventlet/eventlet/releases)
- [Changelog](https://github.com/eventlet/eventlet/blob/master/NEWS)
- [Commits](eventlet/eventlet@v0.25.2...v0.30.2)

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

requirements.txt

@@ -1,7 +1,7 @@
 Brotli==1.0.9
 click==7.1.2
 dnspython==2.1.0
-eventlet==0.25.2
+eventlet==0.30.2
 Flask==0.12.5
 Flask-Compress==1.9.0
 Flask-SocketIO==2.9.6