chore: adjust and cleanup tests

src/BusProNet/XmlParser/BookingInsurancesParser.php

@@ -21,7 +21,7 @@ class BookingInsurancesParser extends AbstractParser
 
         $result->each(function (Crawler $node) use (&$insurances) {
             $insurance = new Insurance();
-            $insurance->id = (int) $node->attr('idversicherung');
+            $insurance->id = $node->attr('idversicherung');
             $insurance->label = $node->attr('bezeichnung');
             $insurance->price = $this->stringToFloat($node->attr('gesamtpreis'));