Use FQCN for Route Facade instead of Alias

With this change dependent projects do not have to register the "Route" Facade alias in config/app.php.

v1.0.2

Fix typo in default configuration (#27)

Improved config file description

v1.0.1

Update README.md

Improved route configurability

The config now allows to pass additional options to the route.

BREAKING

The route option now contains the options that are passed to the route group, whereas the endpoint is now defined in the route_name config key.

Name main route

Name main route "graphql-playground"

https://laravel.com/docs/5.7/routing#named-routes

Enable route caching

Enable route caching by adding a dedicated controller (#11)

Without this PR this package adds a route with an anonymous controller function. This is incompatible with native Laravel route caching, causing the following exception:

```bash
$ php artisan route:cache
Route cache cleared!

   LogicException  : Unable to prepare route [graphql-playground] for serialization. Uses Closure.

  at /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Route.php:880
    876|      */
    877|     public function prepareForSerialization()
    878|     {
    879|         if ($this->action['uses'] instanceof Closure) {
  > 880|             throw new LogicException("Unable to prepare route [{$this->uri}] for serialization. Uses Closure.");
    881|         }
    882| 
    883|         $this->compileRoute();
    884| 

  Exception trace:

  1   Illuminate\Routing\Route::prepareForSerialization()
      /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Console/RouteCacheCommand.php:62

  2   Illuminate\Foundation\Console\RouteCacheCommand::handle()
      /var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:29

  Please use the argument -v to see more details.
```

With this PR route caching is possible again by introducing a controller class for the playground.

Make DownloadAssetsCommand work for Windows too

v0.3.1

Make DownloadAssetsCommand work for Windows too (#10)

Add option to download assets to serve them locally

Add option to download assets to serve them locally (#8)

Resolves #5

Laravel 5.7

5.7 support (#7)

Added support for Laravel 5.7

Middleware & more configuration options

Add security related options to config to disable in production and/o…

…r use a custom route (#4)