Fix Unity 6 WebGL compatibility by replacing deprecated dynCall with makeDynCall

[Niaobu]

Problem

Unity 6 (6000.x) WebGL builds crash with RuntimeError: function signature mismatch when receiving WebSocket messages. This happens because Unity 6 uses a newer Emscripten version where Module.dynCall_* functions are deprecated.

Solution

Replace all Module.dynCall_* invocations with the new makeDynCall syntax as per Unity's official deprecation guidance:

// Before (deprecated):
Module.dynCall_vi(webSocketState.onOpen, instanceId);

// After (Unity 6 compatible):
{{{ makeDynCall('vi', 'webSocketState.onOpen') }}}(instanceId);

Changes

• onOpen callback: dynCall_vi → makeDynCall('vi', ...)
• onMessage callback (2x): dynCall_viii → makeDynCall('viii', ...)
• onError callback: dynCall_vii → makeDynCall('vii', ...)
• onClose callback: dynCall_vii → makeDynCall('vii', ...)

Testing

Tested on Unity 6000.0.63f1 WebGL build - WebSocket connections now work correctly without crashes.

Related

This is similar to PR #54 which fixed the earlier Runtime.dynCall → Module.dynCall_* migration for Unity 2021.2.