add(qa) PHP74Migration:risky rule

Author: connorhu

.php-cs-fixer.dist.php

@@ -17,6 +17,7 @@
     '@PHP70Migration:risky' => true,
     '@PHP71Migration' => true,
     '@PHP74Migration' => true,
+    '@PHP74Migration:risky' => true,
     'heredoc_indentation' => false,
     'declare_strict_types' => false,
     'void_return' => false,