New sensor_wleak.aq1 which is detected as a "lumi.generic.55" device
Hello,

I am facing an issue with my new sensor_wleak.aq1 which is detected as a "lumi.generic.55" device. 
Somebody know why this behavior?

```
pi@raspberrypi:~ $ miio inspect 158d0002705***
 INFO  Attempting to inspect 158d0002705***

Device ID: 158d0002705***
Model info: lumi.generic.55
Address: Owned by miio:520514**
Token: Automatic via parent device
Support: At least basic

Type info: miio, miio:subdevice, sub-thing
Capabilities: 

Parent:
  Device ID: 520514**
  Model info: lumi.gateway.v3
  Address: 192.168.1.4
  Token: 81264c64d56238aa92dcfb82f774**** via auto-token
  Support: At least basic
```

Regards,

