Game and editor crashes on shutdown

[ueshita]

The following Issue is the cause

• https://github.com/godotengine/godot-cpp/issues/889

This plugin uses the following Singleton

• Engine
• RenderingServer
• ResourceLoader

[saki7]

Could you propose this patch to upstream? I have personally tested this fix on my local repo, and it's working. From my experience I'm not 100% sure if the SingletonBinder approach is technically correct or not, but we should be able to hear from core devs if we could submit this.

[ueshita]

It seems that godot-cpp 4.1 has addressed this issue fundamentally.