Update pyproject.toml with all supported versions

Author: holtskinner

pyproject.toml

@@ -23,6 +23,9 @@ classifiers = [
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Operating System :: OS Independent",
   "Topic :: Software Development :: Libraries :: Python Modules",
   "License :: OSI Approved :: Apache Software License",