Make it build on pip 24.x

Author: mkmik

pygments_shader/__init__.py

@@ -1,3 +1,4 @@
-__version__ = '1.0.1'
+
+from .version import __version__
 
 from .lexer import *

setup.py

@@ -1,10 +1,17 @@
 from setuptools import setup, find_packages
 from setuptools.command.test import test as TestCommand
-import pygments_shader
+from importlib.machinery import SourceFileLoader
+from pathlib import Path
+import os
+
+project_root = Path(__file__).parent
+pygments_shader_root = project_root / "pygments_shader"
+
+version = SourceFileLoader("pygments_shader.version", str(pygments_shader_root / "version.py")).load_module()
 
 setup(
     name='pygments-shader',
-    version=pygments_shader.__version__,
+    version=version.__version__,
     description='Pygments lexer for Unity shader',
     long_description=open('README.rst').read(),
     url='https://github.com/midnightSuyama/pygments-shader',