Composer update

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

vendor/jakub-onderka/php-console-highlighter/examples/snippet.php

@@ -0,0 +1,10 @@
+<?php
+use JakubOnderka\PhpConsoleColor\ConsoleColor;
+use JakubOnderka\PhpConsoleHighlighter\Highlighter;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$highlighter = new Highlighter(new ConsoleColor());
+
+$fileContent = file_get_contents(__FILE__);
+echo $highlighter->getCodeSnippet($fileContent, 3);