AC Partner V3: Add socket support (Closes #337)

miio/airconditioningcompanion.py

@@ -284,6 +284,20 @@ def off(self):
         """Turn the air condition off by infrared."""
         return self.send("set_power", ["off"])
 
+    @command(
+        default_output = format_output("Powering socket on"),
+    )
+    def socket_on(self):
+        """Socket power on. Supported by acpartner.v3 only."""
+        return self.send("toggle_plug", ["on"])
+
+    @command(
+        default_output = format_output("Powering socket off"),
+    )
+    def socket_off(self):
+        """Socket power off. Supported by acpartner.v3 only."""
+        return self.send("toggle_plug", ["off"])
+
     @command(
         click.argument("slot", type=int),
         default_output=format_output(