Add tomllib.__all__ (#7433)

stdlib/tomllib.pyi

@@ -2,6 +2,8 @@ from _typeshed import SupportsRead
 from collections.abc import Callable
 from typing import Any
 
+__all__ = ("loads", "load", "TOMLDecodeError")
+
 class TOMLDecodeError(ValueError): ...
 
 def load(__fp: SupportsRead[bytes], *, parse_float: Callable[[str], Any] = ...) -> dict[str, Any]: ...