fix: correct return type from invoke

Author: silentworks

supafunc/_async/functions_client.py

@@ -46,7 +46,7 @@ def set_auth(self, token: str) -> None:
 
     async def invoke(
         self, function_name: str, invoke_options: Optional[Dict] = None
-    ) -> Dict:
+    ) -> Union[Dict, bytes]:
         """Invokes a function
 
         Parameters
@@ -56,11 +56,6 @@ async def invoke(
             `headers`: object representing the headers to send with the request
             `body`: the body of the request
             `responseType`: how the response should be parsed. The default is `json`
-
-        Returns
-        -------
-        Dict
-            Dictionary with data
         """
         headers = self.headers
         if invoke_options is not None: