Drop SQLite support (#2405)

tests/DataFixtures/TestFixture.php

@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\DataFixtures;
+
+use Doctrine\Persistence\ObjectManager;
+
+/**
+ * Defines the sample data to load in during controller tests.
+ */
+interface TestFixture
+{
+    /**
+     * Load data fixtures with the passed EntityManager and returns the created objects.
+     */
+    public function load(ObjectManager $manager): array;
+}