Thinq1 Mini-Split AC: TypeError: Cannot read property 'min' of null
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**Describe The Bug:**
When enabling Thinq1 support, used against a LSN120HSV5 mini-split unit. It uses Thinq1

**To Reproduce:**
Enabling the plugin raises an error when trying to configure the device:

**Expected behavior:**

I was hoping to get control over this Thinq1 device

**Logs:**

```
9/2/2021, 7:09:53 AMLg Thinq Bridge starting
9/2/2021, 7:09:57 AMLg Thinq BridgeLoaded plugin 'homebridge-lg-thinq'
9/2/2021, 7:09:57 AMLg Thinq BridgeLoading 1 platforms...
9/2/2021, 7:09:57 AMLg Thinq BridgeLGThinQLoading accessory from cache: Master Bedroom
9/2/2021, 7:09:57 AMLg Thinq BridgeLGThinQLoading accessory from cache: Living Room
9/2/2021, 7:09:57 AMLg Thinq BridgeBridge is running on port 51846.
9/2/2021, 7:10:04 AMLg Thinq BridgeLGThinQRestoring existing accessory from cache: Master Bedroom
9/2/2021, 7:10:04 AMLg Thinq BridgeLGThinQAC still in development.If you got problem,plz report at https://github.com/nVuln/homebridge-lg-thinq/issues
9/2/2021, 7:10:05 AMLg Thinq BridgeLGThinQAdding new accessory: Dining Room
9/2/2021, 7:10:05 AMLg Thinq BridgeLGThinQAC still in development.If you got problem,plz report at https://github.com/nVuln/homebridge-lg-thinq/issues
9/2/2021, 7:10:05 AMLg Thinq BridgeWARNINGunhandled rejection: TypeError: Cannot read property 'min' of null
```

**Plugin Config:**

```json
{
    "accessories": [],
    "platforms": [
        {
            "platform": "LGThinQ",
            "country": "US",
            "language": "en-US",
            "refresh_interval": 60,
            "auth_mode": "account",
            "username": "REDACTED",
            "password": "REDACTED",
            "thinq1": true,
            "refresh_token": ""
        }
    ]
}
```

**Screenshots:**
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**Environment:**

* **Plugin Version**: 1.1.2
* **Homebridge Version**: 1.3.4 via hoobs 4.0.100
* **Node.js Version**: 14.17.5
* **NPM Version**: 6.14.14
* **Operating System**: Raspbian via hoobs

```
$ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"
```

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