tests: extend support to Python 3.14

Author: fenekku

docs/conf.py

@@ -316,7 +316,7 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    "https://docs.python.org/": None,
+    "python": ("https://docs.python.org/", None),
     "flask": ("http://flask.pocoo.org/docs/latest/", None),
     "flask_menu": ("https://flask-menu.readthedocs.io/en/latest/", None),
     "invenio_assets": ("https://invenio-assets.readthedocs.io/en/latest/", None),

setup.cfg

@@ -37,7 +37,7 @@ install_requires =
 tests =
     pytest-black-ng>=0.4.0
     pytest-invenio>=3.0.0,<4.0.0
-    Sphinx>=5,<6
+    Sphinx>=5
 # Kept for backwards compatibility
 docs =