added PHPUinit

bin/phpunit

@@ -0,0 +1,19 @@
+#!/usr/bin/env php
+<?php
+
+if (!ini_get('date.timezone')) {
+    ini_set('date.timezone', 'UTC');
+}
+
+if (is_file(dirname(__DIR__).'/vendor/phpunit/phpunit/phpunit')) {
+    define('PHPUNIT_COMPOSER_INSTALL', dirname(__DIR__).'/vendor/autoload.php');
+    require PHPUNIT_COMPOSER_INSTALL;
+    PHPUnit\TextUI\Command::main();
+} else {
+    if (!is_file(dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit.php')) {
+        echo "Unable to find the `simple-phpunit.php` script in `vendor/symfony/phpunit-bridge/bin/`.\n";
+        exit(1);
+    }
+
+    require dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit.php';
+}