Bump to Zig 0.12/raylib 5.1-dev (#81)

* Update to Zig 0.12.0 and raylib 5.1-dev

* More build.zig fixes for 0.12

* Get module with target and optimization

* Add examples to build step when compiling for emscripten

* Remove unused function

* Add build.* and emcc.zig to the zon paths (#83)

As per some info found through https://github.com/ziglang/zig/issues/18282,
this is apparently necessary to use this library as a dependency.

Co-authored-by: Drum Ogilvie <me@daogilvie.com>

* Update binding

lib/generate_functions.py

@@ -234,6 +234,10 @@ def parse_header(header_name: str, output_file: str, ext_file: str, prefix: str,
         zig_c_arguments = []
         zig_arguments = []
         zig_call_args = []
+        
+        if not arguments:
+            arguments = "void"
+
         for arg in arguments.split(", "):
             if arg == "void":
                 break