Update metadata for Python support

Author: asmeurer

setup.py

@@ -23,11 +23,14 @@
         "dask": "dask",
         "sparse": "sparse >=0.15.1",
     },
+    python_requires=">=3.9",
     classifiers=[
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
     ],