Function bucket_sort

pub fn bucket_sort<H, F, T>(arr: &mut [T], hasher: F)
where
    H: Ord,
    F: Fn(&T) -> H,
    T: Ord + Clone,

Bucket sort

• arr - Collection of value to be sorted in place.
• hasher - Function hashing to map elements to correspoding buckets.

Ref: https://codereview.stackexchange.com/a/145124