Add missing type declaration

Author: JaZo

src/ResponseBuilder.php

@@ -253,7 +253,7 @@ protected function getMethodFromRequest(RequestInterface $request): string
      *
      * @return string
      */
-    protected function getQueryFromRequest(RequestInterface $request, $replacement = '-'): string
+    protected function getQueryFromRequest(RequestInterface $request, string $replacement = '-'): string
     {
         $query = urldecode($request->getUri()->getQuery());
         $parts = explode('&', $query);