(BUG) Zooz ZEN21 Switch not properly recognized
## Verify the following before opening an trouble issue

**Go over all the following points, and put an `x` in all the boxes that apply.
If you're unsure about any of these, don't hesitate to ask. We're here to help!**

-  [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.

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## About Your Setup
-  How many devices are detected?: 4
-  Mobile App Version(Not required):
-  SmartApp Version: 1.4.48-395
-  Device Handler Version: 2.3.4
-  Homebridge Version: 1.1.0
-  NodeJS Version: 12.17.0

## Expected Behavior
**Tell us what you think should be happening**
The Zooz ZEN21 should register as a switch so it is controllable from within Homebridge and the Apple Home kit app.

## Current Behavior
**What happens instead of the expected behavior?**
The ZEN21 switch registers as a stateless programmable switch

## Steps to Reproduce (for bugs)
**Provide a link to a live example, or an unambiguous set of steps to reproduce this bug. Include code to reproduce, if relevant**

1. Installed the ZooZ ZEN21 Device Handler into the Smart Things app
2. Verified proper functionality (works in the Smart Things app, and with Google Home app)
3. It does NOT register in Homebridge properly

## Context
**How has this issue affected you? What are you trying to accomplish?
**Providing context helps us come up with a solution that is most useful in the real world**
Use the switch to turn on/off the light in my closet. As it is currently, this isn't possible.

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Please include a copy of any relevant log output to assist in tracking down the bug
Homebridge Log:
[5/27/2020, 2:30:33 pm] INFO: Fetching SmartThings-v2 Devices. NOTICE: This may take a moment if you have a large number of device data is being loaded!
[5/27/2020, 2:30:33 pm] GOOD: Refreshing All Device Data | Source: (First Launch)
[5/27/2020, 2:30:35 pm] WARN: Devices to Remove: (0) []
[5/27/2020, 2:30:35 pm] INFO: Devices to Update: (0)
[5/27/2020, 2:30:35 pm] GOOD: Devices to Create: (4) [ 'Master Closet Light', 'Master Fan', 'Master Lamp', 'Master Light' ]
[5/27/2020, 2:30:35 pm] INFO: Added Device: (Master Closet Light | a7db07d8-afdb-4a97-b507-40561a99d5c1)
[5/27/2020, 2:30:35 pm] INFO: Added Device: (Master Fan | a2dc2c12-db1a-4b8a-a36c-d10688b3a6cd)
[5/27/2020, 2:30:35 pm] INFO: Added Device: (Master Lamp | 4360a27a-59ca-4aef-905d-6e357d442f6c)
[5/27/2020, 2:30:36 pm] INFO: Added Device: (Master Light | fda0eb9e-e3f5-453c-af0c-438a11eb0361)
[5/27/2020, 2:30:36 pm] ALERT: Total Initialization Time: (3 seconds)
[5/27/2020, 2:30:36 pm] NOTICE: Unknown Capabilities: ["Zw Multichannel"]
[5/27/2020, 2:30:36 pm] INFO: SmartThings DeviceCache Size: (4)
[5/27/2020, 2:30:36 pm] INFO: WebServer Initiated...
[5/27/2020, 2:30:36 pm] INFO: Sending StartDirect Request to SmartThings | SendToLocalHub: (false)
[5/27/2020, 2:30:36 pm] INFO: SmartThings-v2 Hub Communication Established
[5/27/2020, 2:30:36 pm] INFO: INFO: Your plugin version is up-to-date
[5/27/2020, 2:30:36 pm] NOTICE: Sending Plugin Status to SmartThings | UpdateAvailable: false | newVersion: 2.3.4

Switch details:
<img width="790" alt="bad-switch" src="https://user-images.githubusercontent.com/2954436/83063062-93b05200-a02d-11ea-9fe3-36b81b5d611a.png">
