add deno example with `import 'npm:@msgpack/msgpack'`

[benatkin]

This works for me in Deno:

import * as msgpack from 'npm:@msgpack/msgpack'
msgpack.decode(msgpack.encode(['MessagePack', 'rocks!']))

This is my preferred way to use it with Deno. I am wondering if it could be considered the standard way of using @msgpack/msgpack from Deno. If so, perhaps this could be given an example with just deno.js and the other ones could have longer names. Also the only thing that changes in the other examples is the URL. Perhaps it could just be comments in deno.js:

#!/usr/bin/env deno run
/* eslint-disable no-console */
import * as msgpack from 'npm:@msgpack/msgpack';

// from UNPKG
//import * as msgpack from "https://unpkg.com/@msgpack/msgpack/mod.ts";

// from esm.sh
//import * as msgpack from "https://esm.sh/@msgpack/msgpack/mod.ts";

// from jsDelivr
//import * as msgpack from "https://cdn.jsdelivr.net/npm/@msgpack/msgpack/mod.ts";

console.log(msgpack.decode(msgpack.encode("Hello, world!")));

[gfx]

Hi. I didn't know deno can do it and seemed better than others. Added it in #233.