Add interface for UUID-related exceptions (#340)

Add common interface for exceptions so that wrappers can identify that is a UUID-related exception

src/Exception/UuidExceptionInterface.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * This file is part of the ramsey/uuid library
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
+ * @license http://opensource.org/licenses/MIT MIT
+ */
+
+declare(strict_types=1);
+
+namespace Ramsey\Uuid\Exception;
+
+use Throwable;
+
+interface UuidExceptionInterface extends Throwable
+{
+}