Add reply support through WebSocket

matrixgw_frontend/src/api/WsApi.ts

@@ -17,6 +17,9 @@ export interface RoomMessageEvent extends BaseRoomEvent {
     "m.relates_to"?: {
       rel_type?: "m.replace" | string;
       event_id?: string;
+      "m.in_reply_to"?:{
+        event_id?:string
+      }
     };
     "m.new_content"?: {
       msgtype?: MessageType;