Laravel 5.6 updates

Travis config update

Removed HHVM script as Laravel no longer support HHVM after releasing 5.3

vendor/symfony/console/Output/ConsoleOutputInterface.php

@@ -13,9 +13,11 @@ namespace Symfony\Component\Console\Output;
 
 /**
  * ConsoleOutputInterface is the interface implemented by ConsoleOutput class.
- * This adds information about stderr output stream.
+ * This adds information about stderr and section output stream.
  *
  * @author Dariusz Górecki <darek.krk@gmail.com>
+ *
+ * @method ConsoleSectionOutput section() Creates a new output section
  */
 interface ConsoleOutputInterface extends OutputInterface
 {