chore: updates minimum python runtime and trove classifier

Author: chalmerlowe

packages/django-google-spanner/setup.py

@@ -65,6 +65,10 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Topic :: Utilities",
         "Framework :: Django",
         "Framework :: Django :: 3.2",