bpo-32467: Let collections.abc.ValuesView inherit from Collection (#5152)


diff --git a/Lib/_collections_abc.py b/Lib/_collections_abc.py
index a5c7bfc..dbe30df 100644
--- a/Lib/_collections_abc.py
+++ b/Lib/_collections_abc.py
@@ -746,7 +746,7 @@
 ItemsView.register(dict_items)
 
 
-class ValuesView(MappingView):
+class ValuesView(MappingView, Collection):
 
     __slots__ = ()