0.43.0: Only remove the callback value from our shared array when the last ex…

• Optimization, BindNode will now cache the resolution of a node (Alex Loren)

• BindNode now allows a path to be provided (Alex Loren)

• GArray.append no longer takes a named "value:" parameter, to be
  closer to the Swift idiom on arrays (Joey Nelson)

• Now the GodotError's localizedDescription uses Godot's own localized
  description rather than being a dump of the enumeration values
  (Miguel). Turns it into a more useful Swift Error.

• Fixes the initialization process, so multiple Swift extensions can
  be added to a project (Miguel).

• Fixes the deinitializtaion process (Miguel)

• Brings support for Godot's built-in methods that take variable
  arguments, which were previoulsy not supported, and worked as if there had been no additional arguments provided, this brings:

    func Callable.call (_ args: Variant...)
    func Callable.callDeferred(_ args: Variant...)
    func Callable.rpc(_ args: Variant...)
    func Callable.rpcId(peerId: Int64, _ args: Variant...)
    func Callable.bind(_ args: Variant...)
    func Signal.emit(_ args: Variant...)

• Fix resolution of dynamic types when only proper supertypes are exposed through GDExtension (#493, Gabor Koncz)

• New documentation on how to launch extensions directly from VSCode,
  as an alternative to attach (Zacaria Guenna)