react-native-camera

chore(release): 3.9.0 [skip ci]

# [3.9.0](https://github.com/react-native-community/react-native-camera/compare/v3.8.0...v3.9.0) (2019-11-04)

### Bug Fixes

* **ios:** Fix for a possible crash when changing devices and changing focus. If the new device resets the focus, "defocusing" might not be possible if the new device does not support auto focus. For this reason, we need to do a different cleanup on the focus and exposed flags and events. ([#2557](https://github.com/react-native-community/react-native-camera/issues/2557)) ([8f4601b](https://github.com/react-native-community/react-native-camera/commit/8f4601b))

### Features

* **android:** Android ui thread ([#2560](https://github.com/react-native-community/react-native-camera/issues/2560)) ([87774dd](https://github.com/react-native-community/react-native-camera/commit/87774dd))
* **Ios:** handle audio interruptions ([#2565](https://github.com/react-native-community/react-native-camera/issues/2565)) ([59dfdb6](https://github.com/react-native-community/react-native-camera/commit/59dfdb6))