Please allow access to cached child elements

[steffen-goto]

Please add access to GetCachedChildren() in uiautomation::core::UIElement

pub fn get_cached_children(&self) -> Result<Vec<UIElement>> {
    let elements = unsafe { self.element.GetCachedChildren()? };
    Self::to_elements(elements)
}

[leexgone]

Supported on v0.11.1

[steschu77]

Thanks for the quick fix!