homebridge-nest-cam throws error in logs when user stops viewing camera feed on iOS device. 
**Describe the bug**
homebridge-nest-cam throws error in logs when user stops viewing camera feed on iOS device. 

**Debug Output**
```
Oct 07 11:37:57 raspberrypi homebridge[25408]: [10/7/2020, 11:37:57 AM] [Nest-cam] [NexusStreamer] Connected
Oct 07 11:37:57 raspberrypi homebridge[25408]: [10/7/2020, 11:37:57 AM] [Nest-cam] [NexusStreamer] Redirecting...
Oct 07 11:37:57 raspberrypi homebridge[25408]: [10/7/2020, 11:37:57 AM] [Nest-cam] [NexusStreamer] Disconnected
Oct 07 11:37:57 raspberrypi homebridge[25408]: [10/7/2020, 11:37:57 AM] [Nest-cam] [NexusStreamer] Connected
Oct 07 11:38:14 raspberrypi homebridge[25408]: [10/7/2020, 11:38:14 AM] [Nest-cam] [NexusStreamer] Talkback Begin
Oct 07 11:38:16 raspberrypi homebridge[25408]: [10/7/2020, 11:38:16 AM] [Nest-cam] [NexusStreamer] Talkback End
Oct 07 11:38:21 raspberrypi homebridge[25408]: [10/7/2020, 11:38:21 AM] [Nest-cam] [NexusStreamer] Disconnected
Oct 07 11:38:21 raspberrypi homebridge[25408]: (node:25408) UnhandledPromiseRejectionWarning: Error: write EPIPE
Oct 07 11:38:21 raspberrypi homebridge[25408]:     at WriteWrap.onWriteComplete [as oncomplete] (internal/stream_base_commons.js:94:16)
Oct 07 11:38:21 raspberrypi homebridge[25408]: (Use `node --trace-warnings ...` to show where the warning was created)
Oct 07 11:38:21 raspberrypi homebridge[25408]: (node:25408) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
Oct 07 11:38:21 raspberrypi homebridge[25408]: (node:25408) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
```

**To Reproduce**

Steps to reproduce the behavior:

1. Homebridge configured with homebridge-nest-cam
1. Homebridge and cams added to Home app
1. Click on Doorbell video feed, wait for the live view to come up
1. Click the **X** at the top of the screen to exit the video preview
1. In the log the above output is logged. 

**Expected behavior**
The promise rejection should be handled so that in the future it doesn't terminate the Node.js process (causing homebridge to restart)

Please answer these questions before submitting this issue:
```
On what device are you running homebridge: Raspberry Pi
On what iOS version are you having issues: iOS 14.0.1
What camera types are having issues: Nest Hello, Nest Cam IQ Outdoor
Does this issue occur consistently or randomly: consistently
```