Composer update

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

vendor/psy/psysh/test/CodeCleaner/CodeCleanerTestCase.php

@@ -0,0 +1,41 @@
+<?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 Psy\Test\CodeCleaner;
+
+use PhpParser\NodeTraverser;
+use Psy\CodeCleaner\CodeCleanerPass;
+use Psy\Test\ParserTestCase;
+
+class CodeCleanerTestCase extends ParserTestCase
+{
+    protected $pass;
+
+    public function tearDown()
+    {
+        $this->pass = null;
+        parent::tearDown();
+    }
+
+    protected function setPass(CodeCleanerPass $pass)
+    {
+        $this->pass = $pass;
+        if (!isset($this->traverser)) {
+            $this->traverser = new NodeTraverser();
+        }
+        $this->traverser->addVisitor($this->pass);
+    }
+
+    protected function parseAndTraverse($code, $prefix = '<?php ')
+    {
+        return $this->traverse($this->parse($code, $prefix));
+    }
+}