* Fixed cache clear on Android

* Added file check for file data source.

* Fix for black screen issue on iOS

* Updated changelog

* fix: iOS crashes encountered mainly when playing lots of video in HLS format. I definitely encounter a crash line 380 (#513)

* Updated changelog

* Added key parameter in BetterPlayerCacheConfiguration to provide way to re-use same video between app session

* Format, updated pubspec.yaml

Co-authored-by: themadmrj <themadmrj@users.noreply.github.com>
Co-authored-by: Alexandre Roux <alex@tekartik.com>