Composer update

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

vendor/psy/psysh/src/ContextAware.php

@@ -0,0 +1,28 @@
+<?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;
+
+/**
+ * ContextAware interface.
+ *
+ * This interface is used to pass the Shell's context into commands and such
+ * which require access to the current scope variables.
+ */
+interface ContextAware
+{
+    /**
+     * Set the Context reference.
+     *
+     * @param Context $context
+     */
+    public function setContext(Context $context);
+}