How to publish and register an extra Service Provider in Laravel Package

Question

I would like to publish an extra service provider into App/Providers/ and then register it. The problem is I'm supposed to register it in register() function while I should publish it in boot() function. How should I accomplish that?

Here is what I'm going to and how publish it:

public function boot()
{
    if ($this->app->runningInConsole())
    {
        $this->publishes([
            __DIR__ . '/Console/stubs/SomeServiceProvider.stub' => 
            app_path('Providers/SomeServiceProvider.php'),
        ], 'wire-provider');
    }
}

Here is how I would presumably register it if was published properly:

public function register()
{

    $this->app->register(App\Providers\SomeServiceProvider::class);
}

I would like to point this out, this service provider is not the main service provider for the package, and it's not in the project by default, it should be published first.