Add PHP type hints for Laravel 10

app/Http/Controllers/Api/LanguageController.php

@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers\Api;
 
+use Illuminate\Http\JsonResponse;
 use App\Http\Controllers\Controller;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Http\Request;
@@ -15,7 +16,7 @@ class LanguageController extends Controller
      *
      * @return \Illuminate\Http\JsonResponse
      */
-    public function index(Request $request)
+    public function index(Request $request): JsonResponse
     {
         $array = Language::query()
                          ->select('id', 'name', 'language')