Function write_starship_cache 

pub fn write_starship_cache(
    target_file: &Path,
    fetched_at_epoch: i64,
    non_weekly_label: &str,
    non_weekly_remaining: i64,
    weekly_remaining: i64,
    weekly_reset_epoch: i64,
    non_weekly_reset_epoch: Option<i64>,
) -> Result<()>