Ergonomic upgrades for skip parameters

[zeon256]

Instead of taking Option<u32> in this case

async fn get_taxi_avail(client: &LTAClient, skip: Option<u32>) -> LTAResult<Vec<Coordinates>> {
    build_req_with_skip::<TaxiAvailResp, _, _>(client, api_url!("/Taxi-Availability"), skip).await
}

We can change the skip to impl Into<Option<u32>>.

async fn get_taxi_avail(client: &LTAClient, skip: impl Into<Option<u32>>) -> LTAResult<Vec<Coordinates>> {
    build_req_with_skip::<TaxiAvailResp, _, _>(client, api_url!("/Taxi-Availability"), skip).await
}

This allows you to call it like this.

let _ = get_taxi_avail(&client, 500);
let _ = get_taxi_avail(&client, None);