Fixing installer after recent changes in composer

cakephp/app@68cfee9

Author: kenjis

cake-3.0/src/Console/Installer.php

@@ -41,16 +41,16 @@ public static function postInstall(Event $event)
 
         // ask if the permissions should be changed
         if ($io->isInteractive()) {
-            $validator = (function ($arg) {
+            $validator = function ($arg) {
                 if (in_array($arg, ['Y', 'y', 'N', 'n'])) {
                     return $arg;
                 }
                 throw new Exception('This is not a valid answer. Please choose Y or n.');
-            });
+            };
             $setFolderPermissions = $io->askAndValidate(
                 '<info>Set Folder Permissions ? (Default to Y)</info> [<comment>Y,n</comment>]? ',
                 $validator,
-                false,
+                10,
                 'Y'
             );