`support/rand`: Implement the Uniform distribution.

[github-actions[bot]]

On 2022-05-28 @recmo wrote in 1ec2e50 “Recognize new tags”:

Implement the Uniform distribution.

// FEATURE: Implement the Uniform distribution.

#![cfg(feature = "rand")]
use crate::Uint;
use rand::{
    distributions::{Distribution, Standard, Uniform},

From src/support/rand.rs:1