update test to add new font attributes

Author: LiamConnors

Diff for: packages/python/plotly/plotly/tests/test_core/test_graph_objs/test_frames.py

@@ -51,7 +51,9 @@ def test_deeply_nested_layout_attributes(self):
         matches = return_prop_descriptions(prop_descrip_text)
 
         # It's OK if this needs to change, but we should check *something*.
-        self.assertEqual(set(matches), {"color", "family", "size"})
+        self.assertEqual(
+            set(matches), {"color", "family", "size", "weight", "variant", "style"}
+        )
 
     def test_deeply_nested_data_attributes(self):
         frames = Frame