pub fn latest_status(&self) -> PackageStatus {
        match self {
            SummaryDiffStatus::Added { info } => info.status,
            SummaryDiffStatus::Removed { old_info } => old_info.status,
            SummaryDiffStatus::Modified { new_status, .. } => *new_status,
        }
    }
Returns the new package status if available, otherwise the old status.
guppy-summaries/src/diff.rs