Update socket.io packages to v4.8.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
socket.io (source)	4.8.3 → 4.8.4
socket.io-client (source)	4.8.3 → 4.8.4

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Release Notes

socketio/socket.io (socket.io)

v4.8.4

Compare Source

Bug Fixes

• cleanup pending acks on timeout to prevent memory leak (37aad11)
• prevent uWebSockets.js from serving missing client files (dfb5ab3)
• reject stateful regexps for dynamic namespaces (59f4f24)
• types: allow emitWithAck() for events with void callbacks (#​5453) (8b93a18)
• types: properly import http module (74599a6)

Dependencies

• engine.io@~6.6.0 (no change)
• ws@~8.21.0 (diff)

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