I had to manually enter the HS103 switch type 
<!-- Provide a general summary in the Title above -->

### Expected Behavior
<!-- If you're describing a bug, tell us what should happen -->
Using the minimalist config, the plugin should find all the devices on the network.

<!-- If you're suggesting a change/improvement, tell us how it should work -->

### Current Behavior
<!-- If describing a bug, tell us what happens instead of the expected behavior -->
<!-- If suggesting a change/improvement, explain the difference from current behavior -->
When using the minimal config, the plugin crashes when it finds an HS103 (US) plug.


### Steps to Reproduce (for bugs)
<!-- Please add a series of steps to reproduce the problem. -->
After a fresh install, use the minimal config for the plugin with an HS103 plug on the network and it will crash.
Simply add `      "switchModels" : "HS103"` to get it to work

### Versions
<!-- Please run commands and include versions below. -->
- **Node**:       v10.15.2
- **Homebridge**: v0.4.50
- **OS**:         Linux homebridge 4.19.0-6-686-pae #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) i686 GNU/Linux (running in VMware Fusion)
- **homebridge-tplink-smarthome**: v5.0.0

### Configuration
<!-- Please include the TplinkSmarthome platform section of your config.json file.
Paste between the the two ``` lines below.
-->
To get it to work, I used this:
```json
  "platforms": [
    {
      "platform" : "TplinkSmarthome",
      "name" : "TplinkSmarthome",
      "switchModels" : "HS103"
    }
```
If I just use the minimal config below, it doesn't work
```json
  "platforms": [
    {
      "platform" : "TplinkSmarthome",
      "name" : "TplinkSmarthome",
    }
```

### Homebridge Log / Command Output
<!-- Paste relevant output between the two ``` lines below
  - Remove any sensitive information, passwords, etc.
  - If output is long:
    - Please extract only the relevant portions if possible (remove other plugin's output, etc)
    - Consider creating a gist, etc
  - However, please include the beginning of the log where the homebridge initialization happens if possible
-->
```
jake@homebridge:~/.homebridge$ homebridge --debug
[1/9/2020, 4:20:45 PM] Loaded config.json with 0 accessories and 1 platforms.
[1/9/2020, 4:20:45 PM] Loaded plugin: homebridge-tplink-smarthome
[1/9/2020, 4:20:45 PM] Registering platform 'homebridge-tplink-smarthome.TplinkSmarthome'
[1/9/2020, 4:20:45 PM] Loading 1 platforms...
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] Initializing TplinkSmarthome platform...
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] homebridge-tplink-smarthome v5.0.0, node v10.15.2, homebridge v0.4.50
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] config.json: {"platform":"TplinkSmarthome","name":"TplinkSmarthome"}
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] config: {"platform":"TplinkSmarthome","name":"TplinkSmarthome","addCustomCharacteristics":true,"deviceTypes":[],"switchModels":["HS200","HS210"],"discoveryOptions":{"discoveryInterval":10000,"deviceTypes":[],"deviceOptions":{"defaultSendOptions":{"timeout":15000}},"macAddresses":[],"excludeMacAddresses":[]},"defaultSendOptions":{"timeout":15000}}

[1/9/2020, 4:20:45 PM] [TplinkSmarthome] didFinishLaunching
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] client.startDiscovery({"discoveryInterval":10000,"deviceTypes":[],"deviceOptions":{"defaultSendOptions":{"timeout":15000}},"macAddresses":[],"excludeMacAddresses":[]})
[1/9/2020, 4:20:45 PM] Homebridge is running on port 51826.
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] client.socket: UDP IPv4 listening on 0.0.0.0:36904
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] client.sendDiscovery(255.255.255.255, [], 3)
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] client.startDiscovery(): socket:message From: 192.168.2.104 9999 Message: {"system":{"get_sysinfo":{"sw_ver":"1.1.2 Build 191113 Rel.095623","hw_ver":"2.1","model":"HS103(US)","deviceId":"80066B251464DC8B17860A551F7140021C1154BA","oemId":"24B27E003E98D053CF8B51CE8086FDA8","hwId":"18967AEED1C89BED1BBC7F62FD06468A","rssi":-42,"longitude_i":-1140786,"latitude_i":509403,"alias":"Plug #1","status":"new","mic_type":"IOT.SMARTPLUGSWITCH","feature":"TIM","mac":"50:D4:F7:EB:52:5B","updating":0,"led_off":0,"relay_state":1,"on_time":839,"active_mode":"none","icon_hash":"","dev_name":"Smart Wi-Fi Plug Lite","next_action":{"type":-1},"err_code":0}},"emeter":{"err_code":-1,"err_msg":"module not support"},"smartlife.iot.common.emeter":{"err_code":-1,"err_msg":"module not support"}}
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] device.constructor({"defaultSendOptions":{"timeout":15000},"client":"not shown","host":"192.168.2.104","port":9999,"sysInfo":{"sw_ver":"1.1.2 Build 191113 Rel.095623","hw_ver":"2.1","model":"HS103(US)","deviceId":"80066B251464DC8B17860A551F7140021C1154BA","oemId":"24B27E003E98D053CF8B51CE8086FDA8","hwId":"18967AEED1C89BED1BBC7F62FD06468A","rssi":-42,"longitude_i":-1140786,"latitude_i":509403,"alias":"Plug #1","status":"new","mic_type":"IOT.SMARTPLUGSWITCH","feature":"TIM","mac":"50:D4:F7:EB:52:5B","updating":0,"led_off":0,"relay_state":1,"on_time":839,"active_mode":"none","icon_hash":"","dev_name":"Smart Wi-Fi Plug Lite","next_action":{"type":-1},"err_code":0}})
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] plug.constructor()
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] [Plug #1] device sysInfo set
[1/9/2020, 4:20:45 PM] [TplinkSmarthome.API] [Plug #1] plug sysInfo set
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] New Device Online: [Plug #1] plug [80066B251464DC8B17860A551F7140021C1154BA] 192.168.2.104 9999
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] Adding: [Plug #1] plug [80066B251464DC8B17860A551F7140021C1154BA]
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] [Plug #1] Existing Accessory found [80066B251464DC8B17860A551F7140021C1154BA] [2b30bbe5-bb4d-42f4-8d9b-a8cdc676cbc8] category: OUTLET
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] [Plug #1] getCharacteristicProps Name
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] [Plug #1] setCharacteristicUpdateCallback [Name] 
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] [Plug #1] getCharacteristicProps On
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] [Plug #1] setCharacteristicUpdateCallback [On] 
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] [Plug #1] getCharacteristicProps OutletInUse
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] [Plug #1] setCharacteristicUpdateCallback [OutletInUse] 
[1/9/2020, 4:20:45 PM] TypeError: Cannot read property 'UUID' of undefined
    at HomeKitDevicePlug.getCharacteristic (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/homekit-device/index.js:75:48)
    at HomeKitDevicePlug.supportsCharacteristic (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/homekit-device/index.js:58:17)
    at characteristics.forEach.characteristic (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/tplink-accessory.js:181:25)
    at Array.forEach (<anonymous>)
    at TplinkAccessory.setupCharacteristics (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/tplink-accessory.js:180:21)
    at new TplinkAccessory (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/tplink-accessory.js:110:12)
    at createTplinkAccessory (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/platform.js:74:10)
    at TplinkSmarthomePlatform.addAccessory (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/platform.js:252:23)
    at Client.TplinkSmarthomePlatform.client.on.device (/usr/local/lib/node_modules/homebridge-tplink-smarthome/lib/platform.js:132:12)
    at Client.emit (events.js:189:13)
[1/9/2020, 4:20:45 PM] Got SIGTERM, shutting down Homebridge...
[1/9/2020, 4:20:45 PM] [TplinkSmarthome] shutdown

```
