Specify supported Python versions via trove classifiers

Author: ulgens

pyproject.toml

@@ -15,6 +15,10 @@ classifiers = [
     "License :: OSI Approved :: Apache Software License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
 ]
 dependencies = ["requests", "typing-extensions"]
 dynamic = ["version"]