Jumbo release:
- New object lookup system
- Convenience for NodePath
- Utility functions exposed
- Vararg support in methods
- Lots of bug fixes in the binding to deal with Godot idiosyncrasies.
- No longer surfaces GString, instead hides the Godot string everywhere and surfaces a Swift string
- Implementation of Packed* and their indexers
- Types are now hashable
- Handles subclasses of Ref
- Documentation upgrade
- Annotate some methods with @discardableResult
- Signals are now surfaced in the API
- Indexers for dictionaries