Add pear modules, mail and net_smtp via composer (#93)

Add pear modules, mail and net_smtp via composer, remove php 5.6 build due to phpunit 6

lib/composer/vendor/symfony/console/Helper/TableSeparator.php

@@ -18,9 +18,6 @@ namespace Symfony\Component\Console\Helper;
  */
 class TableSeparator extends TableCell
 {
-    /**
-     * @param array $options
-     */
     public function __construct(array $options = array())
     {
         parent::__construct('', $options);