Add support for py313 (#316)

Author: abhikdps

pyproject.toml

@@ -17,6 +17,7 @@ classifiers = [
   'Programming Language :: Python :: 3.10',
   'Programming Language :: Python :: 3.11',
   'Programming Language :: Python :: 3.12',
+  'Programming Language :: Python :: 3.13',
   'Programming Language :: Python :: Implementation :: CPython',
   'Programming Language :: Python',
   'Topic :: Software Development :: Code Generators',