Add missing return description to Loop::getInfo

Author: kelunik

src/Loop.php

@@ -414,7 +414,7 @@ public static function setErrorHandler(callable $callback = null)
      * Implementations MAY optionally add more information in the array but at minimum the above `key => value` format
      * MUST always be provided.
      *
-     * @return array
+     * @return array Statistics about the loop in the described format.
      */
     public static function getInfo()
     {

src/Loop/Driver.php

@@ -268,7 +268,7 @@ abstract public function setErrorHandler(callable $callback = null);
      * Implementations MAY optionally add more information in the array but at minimum the above `key => value` format
      * MUST always be provided.
      *
-     * @return array
+     * @return array Statistics about the loop in the described format.
      */
     abstract public function getInfo();