Fix flaky test

The order of files found by the Finder depends on the local file system.
On purpose the Finder does not sort, as it can be a big list, as its simply
not needed to work with Gember Event Sourcing; the order is irrelevant.

tests/SymfonyFinderTest.php

@@ -28,10 +28,12 @@ public function itShouldReturnAllFilesInPath(): void
     {
         $files = $this->finder->getFiles(__DIR__ . '/TestDoubles');
 
+        sort($files);
+
         self::assertSame([
-            __DIR__ . '/TestDoubles/TestClass.php',
             __DIR__ . '/TestDoubles/Subfolder/AnotherClass.php',
             __DIR__ . '/TestDoubles/Subfolder/TestClass.php',
+            __DIR__ . '/TestDoubles/TestClass.php',
         ], $files);
     }
 }