fix(django-spanner): update django dependency range to >=5.2, <6.1 and add 6.0 classifier in setup.py

Author: sakthivelmanii

packages/django-google-spanner/setup.py

@@ -18,12 +18,11 @@
 # 'Development Status :: 4 - Beta'
 # 'Development Status :: 5 - Production/Stable'
 release_status = "Development Status :: 5 - Production/Stable"
-# TODO(https://github.com/googleapis/google-cloud-python/issues/18053): Update upper bound when adding support for Django 6.0+
-# (django_spanner/__init__.py currently enforces SUPPORTED_DJANGO_VERSIONS = [(5, 2)])
+# (django_spanner/__init__.py currently enforces SUPPORTED_DJANGO_VERSIONS = [(6, 0), (5, 2)])
 dependencies = [
     "sqlparse >= 0.3.0",
     "google-cloud-spanner >= 3.13.0",
-    "django >= 4.2, < 6.1",
+    "django >= 5.2, < 6.1",
 ]
 extras = {
     "tracing": [
@@ -75,6 +74,7 @@
         "Topic :: Utilities",
         "Framework :: Django",
         "Framework :: Django :: 5.2",
+        "Framework :: Django :: 6.0",
     ],
     extras_require=extras,
     python_requires=">=3.10",