driver/power/tplink: use IotStrip instead of deprecated SmartStrip

Since python-kasa 0.7.0, the SmartStrip class is deprecated [1].

The docs state [2]:

  "If you want to continue to use the old API for older devices, you can
  use the classes in the iot module to avoid deprecation warnings."

Do that.

[1] https://python-kasa.readthedocs.io/en/stable/smartstrip.html
[2] https://python-kasa.readthedocs.io/en/stable/deprecated.html#deprecated-api-reference

Signed-off-by: Bastian Krause <bst@pengutronix.de>

Author: Bastian-Krause

labgrid/driver/power/tplink.py

@@ -1,14 +1,14 @@
 """ Tested with TP Link KP303, and should be compatible with any strip supported by kasa """
 
 import asyncio
-from kasa import SmartStrip
+from kasa.iot import IotStrip
 
 
 async def _power_set(host, port, index, value):
     """We embed the coroutines in an `async` function to minimise calls to `asyncio.run`"""
     assert port is None
     index = int(index)
-    strip = SmartStrip(host)
+    strip = IotStrip(host)
     await strip.update()
     assert (
         len(strip.children) > index
@@ -26,7 +26,7 @@ def power_set(host, port, index, value):
 def power_get(host, port, index):
     assert port is None
     index = int(index)
-    strip = SmartStrip(host)
+    strip = IotStrip(host)
     asyncio.run(strip.update())
     assert (
         len(strip.children) > index