Actualizado a laravel 6, creo que no fue necesario actualizar nada

app/Http/Controllers/BlogController.php

@@ -9,6 +9,7 @@ class BlogController extends Controller
 {
     public function index()
     {
+
         $posts = Post::orderBy('created_at', 'desc')->take(3)->get();
         return view('blog.index', ['posts' => $posts] );
     }

app/Post.php

@@ -7,4 +7,5 @@ use Illuminate\Database\Eloquent\Model;
 class Post extends Model
 {
     protected $table = 'posts';
+
 }

composer.json

@@ -11,7 +11,7 @@
         "php": "^7.1.3",
         "erusev/parsedown": "^1.7",
         "fideloper/proxy": "^4.0",
-        "laravel/framework": "5.8.*",
+        "laravel/framework": "^6.0",
         "laravel/tinker": "^1.0"
     },
     "require-dev": {

config/database.php

@@ -119,7 +119,7 @@ return [
 
     'redis' => [
 
-        'client' => env('REDIS_CLIENT', 'predis'),
+        'client' => env('REDIS_CLIENT', 'phpredis'),
 
         'options' => [
             'cluster' => env('REDIS_CLUSTER', 'predis'),