Add version keyword arg to argparse.ArgumentParser.add_argument

stdlib/2.7/argparse.pyi

@@ -134,7 +134,9 @@ class _ActionsContainer:
         required: bool = ...,
         help: str = ...,
         metavar: str = ...,
-        dest: str = ...) -> None: ...
+        dest: str = ...,
+        version: str = ...,
+    ) -> None: ...
     def add_argument_group(self, *args, **kwargs): ...
     def add_mutually_exclusive_group(self, **kwargs): ...