adding kwargs

Co-authored-by: Frédéric Collonval <[email protected]>

jupyter_nbmodel_client/model.py

@@ -328,7 +328,7 @@ def insert(self, index: int, value: dict[str, t.Any]) -> None:
         with self._lock:
             self._doc.ycells.insert(index, ycell)
 
-    def insert_code_cell(self, index: int, content: str) -> None:
+    def insert_code_cell(self, index: int, content: str, **kwargs) -> None:
         """Insert a code cell at position index.
 
         Args: