Composer update

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

vendor/psy/psysh/test/Reflection/ReflectionConstantBCTest.php

@@ -0,0 +1,26 @@
+<?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\Reflection;
+
+use Psy\Reflection\ReflectionConstant;
+
+class ReflectionConstantBCTest extends \PHPUnit\Framework\TestCase
+{
+    const CONSTANT_ONE = 'one';
+
+    public function testConstruction()
+    {
+        $refl = new ReflectionConstant($this, 'CONSTANT_ONE');
+        $this->assertInstanceOf('Psy\Reflection\ReflectionConstant', $refl);
+        $this->assertInstanceOf('Psy\Reflection\ReflectionClassConstant', $refl);
+    }
+}