Concatenate the given arrays into a new Uint8Array.

import { concat } from "https://deno.land/std@0.181.0/bytes/concat.ts";
const a = new Uint8Array([0, 1, 2]);
const b = new Uint8Array([3, 4, 5]);
console.log(concat(a, b)); // [0, 1, 2, 3, 4, 5]