0.5

• Update to bevy 0.12.
• Add missing docs for Scope.
• Scope now works with Commands and does not require a &mut World.
• Added partial bevy_hierarchy compatibility. All of the query APIs can be used to perform operations with bevy_hierarchy edges.

fn sys(
    query: Query<(&C, Relations<Hierarchy>)>,
    roots: Query<Entity, (With<Children>, Without<Parent>)>
) {
    query.traverse::<Hierarchy>(roots.iter()).for_each(|c, _| {
        // ..
    })
}