Update setup.py (#969)

- added Python 3.12 entry inside classifiers

Author: jakaskerl

setup.py

@@ -228,6 +228,7 @@ def build_extension(self, ext):
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: C++",
         "Programming Language :: Python :: Implementation :: CPython",
         "Topic :: Scientific/Engineering",