Composer update

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

vendor/psy/psysh/src/VersionUpdater/Checker.php

@@ -0,0 +1,31 @@
+<?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\VersionUpdater;
+
+interface Checker
+{
+    const ALWAYS  = 'always';
+    const DAILY   = 'daily';
+    const WEEKLY  = 'weekly';
+    const MONTHLY = 'monthly';
+    const NEVER   = 'never';
+
+    /**
+     * @return bool
+     */
+    public function isLatest();
+
+    /**
+     * @return string
+     */
+    public function getLatest();
+}

vendor/psy/psysh/src/VersionUpdater/GitHubChecker.php

@@ -0,0 +1,89 @@
+<?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\VersionUpdater;
+
+use Psy\Shell;
+
+class GitHubChecker implements Checker
+{
+    const URL = 'https://api.github.com/repos/bobthecow/psysh/releases/latest';
+
+    private $latest;
+
+    /**
+     * @return bool
+     */
+    public function isLatest()
+    {
+        return \version_compare(Shell::VERSION, $this->getLatest(), '>=');
+    }
+
+    /**
+     * @return string
+     */
+    public function getLatest()
+    {
+        if (!isset($this->latest)) {
+            $this->setLatest($this->getVersionFromTag());
+        }
+
+        return $this->latest;
+    }
+
+    /**
+     * @param string $version
+     */
+    public function setLatest($version)
+    {
+        $this->latest = $version;
+    }
+
+    /**
+     * @return string|null
+     */
+    private function getVersionFromTag()
+    {
+        $contents = $this->fetchLatestRelease();
+        if (!$contents || !isset($contents->tag_name)) {
+            throw new \InvalidArgumentException('Unable to check for updates');
+        }
+        $this->setLatest($contents->tag_name);
+
+        return $this->getLatest();
+    }
+
+    /**
+     * Set to public to make testing easier.
+     *
+     * @return mixed
+     */
+    public function fetchLatestRelease()
+    {
+        $context = \stream_context_create([
+            'http' => [
+                'user_agent' => 'PsySH/' . Shell::VERSION,
+                'timeout'    => 3,
+            ],
+        ]);
+
+        \set_error_handler(function () {
+            // Just ignore all errors with this. The checker will throw an exception
+            // if it doesn't work :)
+        });
+
+        $result = @\file_get_contents(self::URL, false, $context);
+
+        \restore_error_handler();
+
+        return \json_decode($result);
+    }
+}

vendor/psy/psysh/src/VersionUpdater/IntervalChecker.php

@@ -0,0 +1,67 @@
+<?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\VersionUpdater;
+
+class IntervalChecker extends GitHubChecker
+{
+    private $cacheFile;
+    private $interval;
+
+    public function __construct($cacheFile, $interval)
+    {
+        $this->cacheFile = $cacheFile;
+        $this->interval  = $interval;
+    }
+
+    public function fetchLatestRelease()
+    {
+        // Read the cached file
+        $cached = \json_decode(@\file_get_contents($this->cacheFile, false));
+        if ($cached && isset($cached->last_check) && isset($cached->release)) {
+            $now = new \DateTime();
+            $lastCheck = new \DateTime($cached->last_check);
+            if ($lastCheck >= $now->sub($this->getDateInterval())) {
+                return $cached->release;
+            }
+        }
+
+        // Fall back to fetching from GitHub
+        $release = parent::fetchLatestRelease();
+        if ($release && isset($release->tag_name)) {
+            $this->updateCache($release);
+        }
+
+        return $release;
+    }
+
+    private function getDateInterval()
+    {
+        switch ($this->interval) {
+            case Checker::DAILY:
+                return new \DateInterval('P1D');
+            case Checker::WEEKLY:
+                return new \DateInterval('P1W');
+            case Checker::MONTHLY:
+                return new \DateInterval('P1M');
+        }
+    }
+
+    private function updateCache($release)
+    {
+        $data = [
+            'last_check' => \date(DATE_ATOM),
+            'release'    => $release,
+        ];
+
+        \file_put_contents($this->cacheFile, \json_encode($data));
+    }
+}

vendor/psy/psysh/src/VersionUpdater/NoopChecker.php

@@ -0,0 +1,36 @@
+<?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\VersionUpdater;
+
+use Psy\Shell;
+
+/**
+ * A version checker stub which always thinks the current verion is up to date.
+ */
+class NoopChecker implements Checker
+{
+    /**
+     * @return bool
+     */
+    public function isLatest()
+    {
+        return true;
+    }
+
+    /**
+     * @return string
+     */
+    public function getLatest()
+    {
+        return Shell::VERSION;
+    }
+}