Update src/vc/rvc.py

src/vc/rvc.py

@@ -1,5 +1,7 @@
 from typing import Any
-from typings.extra import F0Method
+from typing import Literal
+
+F0Method = Literal["rmvpe", "crepe", "mangio-crepe"]
 from multiprocessing import cpu_count
 from pathlib import Path