add 3.12 to tests, change requirement from python <3.12 to <3.13

Author: sfluegel05

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v4

setup.py

@@ -14,7 +14,7 @@
     author_email="martin.glauer@ovgu.de",
     description="",
     zip_safe=False,
-    python_requires=">=3.9, <3.12",
+    python_requires=">=3.9, <3.13",
     install_requires=[
         "certifi",
         "idna",