[Bug] - SEA801-Zigbee/SEA802-Zigbee failed to setup switch
Please use the template and fill in all the data requested below!

**Describe the bug**
I have recently started getting this error in the logs on Homebridge and therefore the "off, heat, and auto" switch will not show up when using the Home app to set the temperature. Another thing that I have noticed is that for some reason the thermostats will set themselves back to heat at 16 degrees without doing anything. When I look at the logs in Homebridge no message has been set so unsure why it resets. If there is any more information that anybody would like then please let me know and I can get that for you. Thank you all in advance for helping me on this.

```
Failed to setup switch for accessory Study Radiator from expose "{"features":[{"access":3,"description":"Enables/disables physical input on the device","name":"state","property":"child_lock","type":"binary","value_off":"UNLOCK","value_on":"LOCK"}],"type":"lock"}": Error: Required "lock_state" property not found for Lock.
```

**Related devices**
Manufacture - Saswell
Model - SEA801-Zigbee/SEA802-Zigbee
Type - Thermostatic Radiator valve

**To Reproduce**
Steps to reproduce the behavior, for example:
1. Pair the device
2. Restart home bridge and see the errors in the logs
3. In the Home app there is no system mode switch

**Expected behavior**
In the Home app there should be a mode switch on the temperature setting screen which allows me to change the state of the thermostat from "off, heat and auto"


**Versions used**
Please provide the version of the following pieces of software:
 - This plugin - homebridge-z2m v1.6.2
 - Homebridge - v1.3.9
 - Zigbee2MQTT (can be found in MQTT topic `zigbee2mqtt/bridge/info`) - 1.22.2

