Fix coding standard

Author: natanfelles

src/Preloader.php

@@ -133,8 +133,8 @@ public function listPackagesFiles(bool $setClasses = true) : array
 
     protected function isDevelopmentClass(string $className) : bool
     {
-        return \str_starts_with($className, 'Framework\\CodingStandard\\')
-            || \str_starts_with($className, 'Framework\\Testing\\');
+        return \str_starts_with($className, 'Framework\CodingStandard\\')
+            || \str_starts_with($className, 'Framework\Testing\\');
     }
 
     /**

tests/support/ReturnObject.php

@@ -7,5 +7,5 @@
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
-return new class() extends \stdClass {
+return new class() extends stdClass {
 };