fix: cython setup

Author: flavioschneider

pyproject.toml

@@ -1,3 +1,2 @@
 [build-system]
-requires = ["setuptools", "wheel", "Cython>=0.29.30"]
-build-backend = "setuptools.build_meta"
+requires = ["setuptools", "wheel", "Cython"]

setup.py

@@ -1,5 +1,5 @@
-from setuptools import find_packages, setup
-from Cython.Build import cythonize
+from setuptools import Extension, find_packages, setup
+from Cython.Build import cythonize, build_ext
 
 with open("README.md", 'r') as f:
     long_description = f.read()
@@ -22,7 +22,8 @@
         "einops>=0.4",
         "einops-exts>=0.0.3"
     ],
-    ext_modules=cythonize(["./aligner_pytorch/*.pyx"]),
+    extensions=[Extension("*", ["*.pyx"])],
+    cmdclass={'build_ext': build_ext},
     classifiers=[
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",