(BUG) Temperature showing up as F even though C is hardcoded in config
-  [X] That _OAuth_ is Enabled for the SmartApp under the IDE.
-  [X] The SmartApp and Device Handler are using the latest code available.
-  [X] That Both the SmartApps and Device Handlers have been _Published for You_ in the IDE.

---
## About Your Setup
-  How many devices are detected?: 5
-  Homebridge Version: 2.6
-  NodeJS Version: v14.15.1

## Expected Behavior
Should display temperature in Celsius

## Current Behavior
Still displays temperature in Fahrenheit

## Steps to Reproduce (for bugs)

1. Open Home app
2. Tap on Sensors

## Context
Want to see temperature in Celsius
<img width="812" alt="Screen Shot 2020-12-12 at 2 24 01 PM" src="https://user-images.githubusercontent.com/53539423/101993107-ef6ac180-3c85-11eb-9ffa-3da0c07aec97.png">
<img width="287" alt="Screen Shot 2020-12-12 at 2 17 41 PM" src="https://user-images.githubusercontent.com/53539423/101993110-f265b200-3c85-11eb-9757-be2591739fcb.png">


---
Please include a copy of any relevant log output to assist in tracking down the bug
