Composer update

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

vendor/dnoegel/php-xdg-base-dir/README.md

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+# XDG Base Directory
+
+[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)
+
+Implementation of XDG Base Directory  specification for php
+
+## Install
+
+Via Composer
+
+``` bash
+$ composer require dnoegel/php-xdg-base-dir
+```
+
+## Usage
+
+``` php
+$xdg = \XdgBaseDir\Xdg();
+
+echo $xdg->getHomeDir();
+echo $xdg->getHomeConfigDir()
+echo $xdg->getHomeDataDir()
+echo $xdg->getHomeCacheDir()
+echo $xdg->getRuntimeDir()
+
+$xdg->getDataDirs() // returns array
+$xdg->getConfigDirs() // returns array
+```
+
+## Testing
+
+``` bash
+$ phpunit
+```
+
+## License
+
+The MIT License (MIT). Please see [License File](https://github.com/dnoegel/php-xdg-base-dir/blob/master/LICENSE) for more information.