Change listener

[sindresorhus]

Could be useful to expose a way to be notified when the status changes.

Some resources:

• https://stackoverflow.com/questions/42681127/coremediaio-incorrectly-updated-properties-kcmiodevicepropertydeviceisrunningso?rq=1
• https://github.com/wouterdebie/onair/blob/52f2ea0b72793e1eee0f64478bc7c3a87c094a02/Sources/onair/Camera.swift
• https://github.com/jakobwesthoff/on-air-notifier/blob/de4a5794c561be510b1a0537f229f03fbb6e6635/on-air-notifier/CameraWatcher.swift
• https://github.com/lvsti/Cameo/blob/79d0037e839807b08e590cd7f8027e1a163aa456/CameoSDK/Property.swift

[Oluwasetemi]

Can I help with this?

[sindresorhus]

Sure :)