[Bug]: TypeError: device.getStationSerial is not a function
### What happened?

A bug happened!
I am using EufySecurity with homebridge on a docker container, and I get a weird error which seems related just to the homebridge plugin code.

It keeps crashing. My config is just

```
        {
            "platform": "EufySecurity",
            "username": "**********",
            "password": "**********"
            "country": "GB",
            "ignoreStations": [],
            "ignoreDevices": []
        }
```

### Device Type

Doorbell (Supported)

### Plugin Version

v2.0.x (Supported)

### HomeBridge Version

v1.4.x (Supported)

### NodeJS Version

v16 (Supported)

### Operating System

Docker (UnSupported)

### Relevant log output

```shell
[6/18/2022, 9:08:07 PM] TypeError: device.getStationSerial is not a function
    at /homebridge/node_modules/homebridge-eufy-security/node_modules/eufy-security-client/src/eufysecurity.ts:517:56
    at Array.forEach (<anonymous>)
    at /homebridge/node_modules/homebridge-eufy-security/node_modules/eufy-security-client/src/eufysecurity.ts:516:21
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at EufySecurity.getDevices (/homebridge/node_modules/homebridge-eufy-security/node_modules/eufy-security-client/src/eufysecurity.ts:312:13)
    at EufySecurityPlatform.discoverDevices (/homebridge/node_modules/homebridge-eufy-security/src/platform.ts:258:25)
    at EufySecurityPlatform.pluginSetup (/homebridge/node_modules/homebridge-eufy-security/src/platform.ts:167:5)
    at HomebridgeAPI.<anonymous> (/homebridge/node_modules/homebridge-eufy-security/src/platform.ts:146:7)
```
