Addressed phpstan cases

app/Entities/Tools/BookSortMap.php

@@ -24,7 +24,7 @@ class BookSortMap
 
     public static function fromJson(string $json): self
     {
-        $map = new static();
+        $map = new BookSortMap();
         $mapData = json_decode($json);
 
         foreach ($mapData as $mapDataItem) {

app/Http/Controllers/Controller.php

@@ -48,6 +48,8 @@ abstract class Controller extends BaseController
     /**
      * On a permission error redirect to home and display.
      * the error as a notification.
+     *
+     * @return never
      */
     protected function showPermissionError()
     {