Update Laravel 5.8 Skeleton

Updated to laravel/laravel@f191f6f

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

laravel/config/app.php

@@ -178,6 +178,7 @@
     'aliases' => [
 
         'App' => Illuminate\Support\Facades\App::class,
+        'Arr' => Illuminate\Support\Arr::class,
         'Artisan' => Illuminate\Support\Facades\Artisan::class,
         'Auth' => Illuminate\Support\Facades\Auth::class,
         'Blade' => Illuminate\Support\Facades\Blade::class,
@@ -207,6 +208,7 @@
         'Schema' => Illuminate\Support\Facades\Schema::class,
         'Session' => Illuminate\Support\Facades\Session::class,
         'Storage' => Illuminate\Support\Facades\Storage::class,
+        'Str' => Illuminate\Support\Str::class,
         'URL' => Illuminate\Support\Facades\URL::class,
         'Validator' => Illuminate\Support\Facades\Validator::class,
         'View' => Illuminate\Support\Facades\View::class,

laravel/config/services.php

@@ -20,6 +20,10 @@
         'endpoint' => env('MAILGUN_ENDPOINT', 'api.mailgun.net'),
     ],
 
+    'postmark' => [
+        'token' => env('POSTMARK_TOKEN'),
+    ],
+
     'ses' => [
         'key' => env('AWS_ACCESS_KEY_ID'),
         'secret' => env('AWS_SECRET_ACCESS_KEY'),
@@ -31,7 +35,7 @@
     ],
 
     'stripe' => [
-        'model' => 'App\User',
+        'model' => App\User::class,
         'key' => env('STRIPE_KEY'),
         'secret' => env('STRIPE_SECRET'),
         'webhook' => [