Fix broken tests

Author: insolor

async_tkinter_loop/async_tkinter_loop.py

@@ -64,4 +64,4 @@ async def some_async_function():
 
         button = tk.Button("Press me", command=some_async_function)
     """
-    return lambda *handler_args: asyncio.create_task(command(*handler_args, *args, **kwargs))
+    return lambda *handler_args: asyncio.get_event_loop().create_task(command(*handler_args, *args, **kwargs))