Fix LessSpecificImplementedReturnType (2x)

lib/SimpleSAML/HTTP/RunnableResponse.php

@@ -63,9 +63,11 @@ class RunnableResponse extends Response
     /**
      * "Send" this response by actually running the callable.
      *
-     * @return self
+     * @return $this
+     *
+     * Note: No return-type possible due to upstream limitations
      */
-    public function sendContent(): object
+    public function sendContent()
     {
         return call_user_func_array($this->callable, $this->arguments);
     }

lib/SimpleSAML/XHTML/Template.php

@@ -527,8 +527,10 @@ class Template extends Response
     /**
      * Send this template as a response.
      *
-     * @return Response This response.
+     * @return $this This response.
      * @throws \Exception if the template cannot be found.
+     *
+     * Note: No return type possible due to upstream limitations
      */
     public function send()
     {