Laravel 5.6 updates

Travis config update

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

vendor/symfony/routing/Tests/Fixtures/php_dsl_i18n.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Symfony\Component\Routing\Loader\Configurator;
+
+return function (RoutingConfigurator $routes) {
+    $routes
+        ->collection()
+        ->prefix(array('en' => '/glish'))
+        ->add('foo', '/foo')
+        ->add('bar', array('en' => '/bar'));
+
+    $routes
+        ->add('baz', array('en' => '/baz'));
+
+    $routes->import('php_dsl_sub_i18n.php')
+        ->prefix(array('fr' => '/ench'));
+};