Add support for Godot 4.2 static typing for for loop variable

[chrisl8]

Godot 4.2 now supports typing the variable declaration in a for loop:
godotengine/godot#80247

However gdformat fails when this syntax is used.

As of Godot 4.2 Beta, this syntax is valid:

var dict := {1: 2}
for key: String in dict:
    print(key)

However, running gdformat on it results in this error:
Previous tokens: [Token('NAME', 'key')]

[neilgoodman]

I ran into this issue the other day when using Godot 4.2 beta 2. I just submitted a PR to address it. My changes are working for me locally.

[chrisl8]

Works great @neilgoodman ! Thanks so much for the quick fix! 🙏