Use str(self) instead of self.__str__() in full_name property

Calling the dunder directly bypasses the normal str() protocol for no
reason.

Author: derek73

nameparser/parser.py

@@ -774,7 +774,7 @@ def is_turkic_patronymic_marker(self, piece: str) -> bool:
     @property
     def full_name(self) -> str:
         """The string output of the HumanName instance."""
-        return self.__str__()
+        return str(self)
 
     @full_name.setter
     def full_name(self, value: str | bytes) -> None: