Fix pytest-asyncio usage (#217)

Author: Shutgun

tests/test_device.py

@@ -1,6 +1,6 @@
 """Test communicating with a devolo device."""
 
-from asyncio import AbstractEventLoop
+from asyncio import get_event_loop
 from unittest.mock import AsyncMock, Mock, patch
 
 import pytest
@@ -104,10 +104,10 @@ async def test_async_disconnect(self, mock_device: Device):
         assert mock_device._session.aclose.call_count == 0  # type: ignore[attr-defined]
         assert not mock_device._connected
 
-    def test_disconnect(self, mock_device: Device, event_loop: AbstractEventLoop):
+    def test_disconnect(self, mock_device: Device):
         """Test that the sync disconnect method just calls the async disconnect method."""
         with patch("devolo_plc_api.device.Device.async_disconnect", new=AsyncMock()) as ad:
-            mock_device._loop = event_loop
+            mock_device._loop = get_event_loop()
             mock_device.disconnect()
             assert ad.call_count == 1