Add Home Assistant support for Sinopé water leak detector (#3892)

lib/extension/homeassistant.js

@@ -1774,6 +1774,7 @@ const mapping = {
         switchEndpoint('l1'), switchEndpoint('l2'), switchEndpoint('l3'), switchEndpoint('l4'),
         switchEndpoint('l5'),
     ],
+    'WL4200': [cfg.binary_sensor_water_leak, cfg.binary_sensor_battery_low],
 };
 
 /**