[stubsabot] Bump Flask-SocketIO to 5.7.*

Release: https://pypi.org/pypi/Flask-SocketIO/5.7.1
Homepage: https://code.miguelgrinberg.com/miguelgrinberg/flask-socketio
Repository: https://github.com/miguelgrinberg/flask-socketio
Typeshed stubs: https://github.com/python/typeshed/tree/main/stubs/Flask-SocketIO
Changelog: https://code.miguelgrinberg.com/miguelgrinberg/flask-socketio/src/branch/main/CHANGES.md
Diff: miguelgrinberg/Flask-SocketIO@v5.6.1...v5.7.1

Stubsabot analysis of the diff between the two releases:
 - Total lines of Python code added: 186.
 - Total lines of Python code deleted: 189.

If stubtest fails for this PR:
- Leave this PR open (as a reminder, and to prevent stubsabot from opening another PR)
- Fix stubtest failures in another PR, then close this PR

Author: stubsabot

stubs/Flask-SocketIO/METADATA.toml

@@ -1,3 +1,3 @@
-version = "5.6.*"
+version = "5.7.*"
 upstream-repository = "https://github.com/miguelgrinberg/flask-socketio"
 dependencies = ["Flask>=0.9"]