Update to Godot version 4

Hi, 

I did open a PR to update to version 4, 
This is the PR https://github.com/jotson/ridiculous_coding/pull/15

Would be nice for someone to double-check things if possible. 
I tested on the macOS, I need to grab my Linux machine to test it, but I don't have a windows machine to test. 

Thanks for everything!