How to register service provider in Laravel 5 console application

I've built a console app using illuminate/console, and I would like to use a Laravel package in one of the commands.

The package's instructions say:

Add the service provider to config/app.php

'Syntax\SteamApi\SteamApiServiceProvider'

How should I register the above service provider and use its facades when not using the full Laravel framework?

Here is my app.php file, which I run in the console with php app.php:

<?php

use Illuminate\Console\Application;
use Illuminate\Container\Container;
use Illuminate\Events\Dispatcher;

use Myvendor\Myproject\Console\Commands\Mycommand;

if (file_exists($a = __DIR__.'/../../autoload.php')) {
    require_once $a;
} else {
    require_once __DIR__.'/vendor/autoload.php';
}

$container = new Container;
$dispatcher = new Dispatcher;
$version = "5.5"; // Laravel version

$app = new Application($container, $dispatcher, $version);

$app->add(new Mycommand);

$app->run();

via Chebli Mohamed