chore: fix phpstan errors

src/BusProNet/XmlParser/PickupsParser.php

@@ -7,6 +7,7 @@ use Symfony\Component\DomCrawler\Crawler;
 
 class PickupsParser extends AbstractParser
 {
+    /** @return array<int, Pickup> */
     public function parse(Crawler $result): array
     {
         $pickups = [];