Handle GetStreamInfo returning None for suspended channels

twitch.py

@@ -1633,6 +1633,7 @@ class Twitch:
                 response_list: list[JsonType] = await coro
                 for response_json in response_list:
                     channel_data: JsonType = response_json["data"]["user"]
+                    if channel_data is not None:
                         acl_streams_map[int(channel_data["id"])] = channel_data
         except Exception:
             # asyncio.as_completed doesn't cancel tasks on errors