Update multivalued_dict_module.py

Author: fsssosei

src/multivalued_dict_package/multivalued_dict_module.py

@@ -83,7 +83,7 @@ class multivalued_dict(UserDict, metaclass = __eliminate_metaclass_conflicts):
     from collections import defaultdict
     from collections.abc import Iterable
 
-    version = '1.7.2'
+    version = '1.7.3'
 
     __marker = object()