Add support for typed arrays and match Godot 4 formatting.

[bolinfest]

I have been using this project to parse my .tscn files on Godot 4, which required some updates here to make things work:

• Now .tscn files seem to be saved without spaces around args, so ExtResource("7") instead of ExtResource( "7" )
• My files have properties like polygons = Array[PackedInt32Array]([PackedInt32Array(0, 1, 2, 3), PackedInt32Array(4, 0, 3, 5)]) that did not seem to be accounted for in the existing grammar, so I had to add new rules in values.py and a GDTypedArray class to parse these new types into.
• Not all objects have arguments (e.g., PackedStringArray()), so made the arg list for obj_type optional

This isn't well-tested, but empirically, it works for my purposes, so feel free to adapt as you see fit! Even if this isn't upstreamed, perhaps it will help someone else.

[stevearc]

I'm happy to merge this! Would just require:

1. A test for the typed arrays in test_parser.py
2. A simple test for typed arrays in test_objects.py
3. Fix the failing tests

I think that the CI has rotted a bit in general. I'll see if I can get it back to a green state on master

[bolinfest]

@stevearc if you can get CI healthy on master, then I'm happy to add tests!

[stevearc]

@bolinfest builds are working on master again