Set router to utf8 is in symfony 5.1 (#29)

Not setting the router to utf8 is deprecated in symfony 5.1

Author: Nemo64

src/config/parameters.php

@@ -10,3 +10,10 @@
         'annotations' => ['cache' => 'none'],
     ]);
 }
+
+// Not setting the router to utf8 is deprecated in symfony 5.1
+if (\Symfony\Component\HttpKernel\Kernel::VERSION_ID >= 50100) {
+    $container->loadFromExtension('framework', [
+        'router' => ['utf8' => true],
+    ]);
+}