Python dependency: Update flask-socketio requirement from ==5.4.* to ==5.5.* in /web/regression

[dependabot]

Updates the requirements on flask-socketio to permit the latest version.

Release notes

Sourced from flask-socketio's releases.

Release 5.5.0

See CHANGES.md for release notes.

Changelog

Sourced from flask-socketio's changelog.

Flask-SocketIO change log

Release 5.5.0 - 2024-12-18

• Add a reason argument to the disconnect handler (commit)
• Upgrade the code to more recent Python versions ([commit #1](miguelgrinberg/Flask-SocketIO@6a6734f) [commit #2](miguelgrinberg/Flask-SocketIO@c3667e8))
• Remove misleading warning about use of gevent-websocket in the documentation #2122 (commit)
• fix typo in deployment documentation #2119 (commit) (thanks Maximilien Tirard!)

Release 5.4.1 - 2024-10-01

• Removed a debugging statement (commit)

Release 5.4.0 - 2024-09-30

• Support catch-all events with socketio.on('*') #2095 (commit)

Release 5.3.7 - 2024-09-02

• Prevent crash when client sends empty event (commit)
• Handle events with catch-all namespace #2061 (commit)
• Add unit test for background tasks (commit)
• Drop Python 3.7, add Python 3.12, upgrade to pypy 3.10 (commit)

Release 5.3.6 - 2023-09-05

• Fixes in the test client to support recent changes in Socket.IO dependencies #2006 (commit)

Release 5.3.5 - 2023-07-26

• Prevent allow_unsafe_werkzeug option from being passed to web servers #2001 (commit)

Release 5.3.4 - 2023-05-03

• Fixed cookie handling in Test Client for Flask >= 2.3 #1982 (commit)
• Correctly handle ConnectionRefusedError in connect handler #1959 (commit)
• More secure nginx configuration examples #1966 (commit) (thanks Lorenzo Leonardini!)

Release 5.3.3 - 2023-03-17

• Invalid arguments passed in call() function #1953 (commit)

Release 5.3.2 - 2022-11-20

• Deliver callbacks from different namespaces #1909 (commit)
• Fix documentation typos #1881 (commit) (thanks Tim Gates!)

Release 5.3.1 - 2022-09-11

• Always pop allow_unsafe_werkzeug option from kwargs #1877 (commit) (thanks zakx!)

... (truncated)

Commits

• ef54be9 Release 5.5.0
• 01628b7 Add a reason argument to the disconnect handler
• c3667e8 Upgrade the code to more recent Python versions
• a1d3d61 Remove misleading warning about use of gevent-websocket (Fixes #2122)
• 6a6734f remove obsolete Python 2.x style constructs
• eeb3c43 fix typo in deployment documentation (#2119)
• e728965 Version 5.4.2.dev0
• ee659d5 Release 5.4.1
• 6841bd5 remove a debugging statement
• 16fea7a Version 5.4.1.dev0
• See full diff in compare view

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[dependabot]

Looks like flask-socketio is no longer updatable, so this is no longer needed.