A transitional release ahead of 4.0. Nothing is removed yet, this version just lights up deprecation notices on things that will disappear in 4.0, so you can get your code ready in peace.

💥 Deprecated (will be removed in 4.0)

• Magic properties Component::$name, Component::$parent and Container::$components – use getName(), getParent(), getComponents() instead.
• Calling monitor($type) without callbacks – pass them directly: monitor($type, $attached, $detached). Overriding attached() / detached() in subclasses is on its way out.
• Constant IComponent::NAME_SEPARATOR – switch to IComponent::NameSeparator (the deprecation is now reported via the native #[\Deprecated] attribute).