Migrate tests to Pest (#8)

Reviewed-on: #8

tests/Integration/TestDocument.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+namespace Test\Integration;
+
+class TestDocument
+{
+    public function __construct(public string $id = '', public string $value = '', public int $num_value = 0,
+                                public ?SubDocument $sub = null) { }
+}