Minor fix of a deprecation warning

gui.py

@@ -1791,7 +1791,8 @@ if __name__ == "__main__":
         if task.exception() is not None:
             exit_event.set()
 
-    loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
+    asyncio.set_event_loop(loop)
     exit_event = asyncio.Event()
     main_task = loop.create_task(main(exit_event))
     main_task.add_done_callback(main_exit)

main.py

@@ -149,7 +149,8 @@ logging.getLogger("TwitchDrops.websocket").setLevel(settings.debug_ws)
 
 # client run
 exit_status = 0
-loop = asyncio.get_event_loop()
+loop = asyncio.new_event_loop()
+asyncio.set_event_loop(loop)
 client = Twitch(settings)
 signal.signal(signal.SIGINT, lambda *_: client.close())
 signal.signal(signal.SIGTERM, lambda *_: client.close())