Composer update

* updated Laravel to v5.6.38
* Added laravel tinker in dev dependencies

vendor/psy/psysh/test/Command/ExitCommandTest.php

@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2018 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console\Tests\Command;
+
+use Psy\Command\ExitCommand;
+use Symfony\Component\Console\Tester\CommandTester;
+
+class ExitCommandTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @expectedException \Psy\Exception\BreakException
+     * @expectedExceptionMessage Goodbye
+     */
+    public function testExecute()
+    {
+        $command = new ExitCommand();
+        $tester = new CommandTester($command);
+        $tester->execute([]);
+    }
+}