Added updated GDScript lexer.

[admoore0]

Godot 4 was released a while ago, and the release changed a lot of things in GDScript. This new lexer is currently capable of processing GDScript files written in 4.0 or later. I renamed the existing GDScript lexer to GDScript3, and gave the new one (now named GDScript) a priority of 0.1. I also added some simple analyzers to differentiate if only a file extension is given.

[alecthomas]

Thanks!

Would you mind converting this to an XML lexer please? Chroma has deprecated use of Go lexers. You can do this with mkdir out && chroma --xml=out then copying out/gdscript.xml to lexers/embedded/gdscript4.xml.

Also rename this to GDScript4 (or rename the original to GDScript3).

As for the conflict, that's fairly straightforward to resolve. If GDScript4 is the most common, give it a higher <priority>0.1</priority>. I also might suggest adding some analyse patterns, see the c.xml lexer for an example:

    <analyse single="true" >
      <regex pattern="(?m)^\s*#include &lt;" score="0.1" />
      <regex pattern="(?m)^\s*#ifn?def " score="0.1" />
    </analyse>

[alecthomas]

You'll probably need to rename the existing tests to gdscript3.