Adding a trait for container aware provider classes.
FileLoader is now using ContainerAware trait.
Hooks and Input is now using ContainerAware trait.
Menu is now using ContainerAware trait.
PostTypes is now using ContainerAware trait.
Removing response provider. It's not needed.
Widgets is now using ContainerAware trait.
FileLoader fix.
Updating composer.
Merge branch 'task/cleanup'