refactor: Reuse th constructor

src/frformat/enum_format.py

@@ -12,6 +12,7 @@ class EnumFormat(CustomStrFormat):
         May preprocess the input and valid values according to given "options"."""
 
         def __init__(self, options: Optional[Options] = None):
+            super().__init__()
             self._options = options if options is not None else Options()
             _normalized_extra_values = {
                 normalize_value(e, self._options)