Cannot read property 'toString' of undefined
App version: 3.0.
TV: Sony Brava KD-55X8507C

I upgraded from 2.0 to 3.0 today, but I'm seeing the following error in the logs. Also, the inputs are spread out as different accessories instead of being under TV (although, this may just be a remaining issue from 2.0 which hasn't corrected itself yet since 3.0 has the error below. I tried to put in DEBUG, but the below is all I get:

```
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] Initializing BraviaOSPlatform platform...
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] **************************************************************
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] BraviaOSPlatform v3.0.0 by SeydX
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] GitHub: https://github.com/SeydX/homebridge-bravia-tvos
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] Email: seyd55@outlook.de
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] **************************************************************
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] start success...
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] [INFO] TV: Initalizing Bravia API with PSK
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] [INFO] Configuring accessory TV
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] [INFO] TV: Cheking authentication...
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] [INFO] TV: Authenticated!
2019-04-25T06:37:31.859Z BraviaPlatform TV: Adding Television Service
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] [ERROR] TV: An error occured while handling accessories!
[4/25/2019, 8:37:31 AM] [BraviaOSPlatform] [ERROR] TypeError: Cannot read property 'toString' of undefined
```

There's nothing too special about the config. I tried setting cecInputs to false, and also removed the apps, but that made no difference.

```
        {
            "platform": "BraviaOSPlatform",
            "tvs": [
                {
                    "name": "TV",
                    "ip": "xxx.xxx.xxx.xxx",
                    "port": 80,
                    "psk": "xxxxxxx",
                    "extraInputs": false,
                    "cecInputs": true,
                    "channelInputs": false,
                    "apps": [
                        "YouTube",
                        "Netflix",
                        "Prime Video"
                    ]
                }
            ],
            "interval": 10
        }
```