Use Any for the register_type converter return type

Author: Blacksujit

stubs/behave/behave/api/step_matchers.pyi

@@ -1,7 +1,9 @@
 from collections.abc import Callable
+from typing import Any
 from typing_extensions import deprecated
 
-def register_type(**kwargs: Callable[[str], object]) -> None: ...
+# The converter can return any type and behave passes the result straight to the step function.
+def register_type(**kwargs: Callable[[str], Any]) -> None: ...
 def use_default_step_matcher(name: str | None = None): ...
 def use_step_matcher(name: str): ...
 @deprecated("Use use_step_matcher() instead.")