Cannot update
Hi.

I am having trouble upgrading from version 5.0.16. The plugin works fine, but cannot be updated. Other plugins can be updated. 

Node.js is v16.14.2, NPM v8.7.0, but tried on earlier ones as well (like Node 16.2.0, NPM 8.2.0 etc.). 


Here's what pops up:

```
npm WARN deprecated querystring@0.2.1: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
npm WARN deprecated uuid@3.4.0: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
npm WARN deprecated uuid@3.4.0: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated request-promise@4.2.6: request-promise has been deprecated because it extends the now deprecated request package, see https://github.com/request/request/issues/3142
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm ERR! code 1
npm ERR! path /usr/local/lib/node_modules/homebridge-camera-ui/node_modules/ffmpeg-for-homebridge
npm ERR! command failed
npm ERR! command sh -c node install.js
npm ERR! Downloading ffmpeg from https://github.com/homebridge/ffmpeg-for-homebridge/releases/latest/download/ffmpeg-raspbian-armv6l.tar.gz
npm ERR! node:events:504
npm ERR!       throw er; // Unhandled 'error' event
npm ERR!       ^
npm ERR! 
npm ERR! Error: EACCES: permission denied, open '/home/pi/.npm/_ffmpeg_for_homebridge/.download'
npm ERR! Emitted 'error' event on WriteStream instance at:
npm ERR!     at emitErrorNT (node:internal/streams/destroy:157:8)
npm ERR!     at emitErrorCloseNT (node:internal/streams/destroy:122:3)
npm ERR!     at processTicksAndRejections (node:internal/process/task_queues:83:21) {
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'open',
npm ERR!   path: '/home/pi/.npm/_ffmpeg_for_homebridge/.download'
npm ERR! }

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/pi/.npm/_logs/2022-04-17T06_31_03_485Z-debug-0.log

Command failed. Please review log for details.
```


Can you please help me?

Greetings