0.8.3

This release fixes the following deprecation you may encounter in your Symfony app:

Method "Symfony\Component\DependencyInjection\Extension\ExtensionInterface::load()" might add "void" as a native return type declaration in the future. Do the same in implementation "Dubture\FFmpegBundle\DependencyInjection\DubtureFFmpegExtension" now to avoid errors or add an explicit return annotation to suppress this message.