Fix service loading and model compatibility for Contao 5.7

src/DependencyInjection/ContaoPinboardExtension.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Eiswurm\ContaoPinboardBundle\DependencyInjection;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+
+final class ContaoPinboardExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container): void
+    {
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../../contao/config'));
+        $loader->load('services.yaml');
+    }
+}