fix(stub): update stub

Author: ChieloNewctle

general_sam/general_sam.pyi

@@ -46,11 +46,11 @@ class GeneralSAMState:
     def get_trans(self) -> Mapping[ByteOrChar, int]: ...
     def get_suffix_parent_id(self) -> int: ...
     def copy(self) -> 'GeneralSAMState': ...
-    def goto_suffix_parent(self): ...
-    def goto_char(self, t: str): ...
-    def goto_byte(self, t: int): ...
-    def feed_chars(self, s: str): ...
-    def feed_bytes(self, s: bytes): ...
+    def goto_suffix_parent(self) -> None: ...
+    def goto_char(self, t: str) -> None: ...
+    def goto_byte(self, t: int) -> None: ...
+    def feed_chars(self, s: str) -> None: ...
+    def feed_bytes(self, s: bytes) -> None: ...
     def dfs_along(
         self,
         trie: Trie,