Fix incorrect case

Author: tvdijen

src/XML/md/ContactPerson.php

@@ -382,7 +382,7 @@ private static function processArrayContents(array $data): array
     public function toArray(): array
     {
         $data = [
-            'ContactType' => $this->getContactType()->getValue(),
+            'contactType' => $this->getContactType()->getValue(),
             'Company' => $this->getCompany()?->getContent()->getValue(),
             'GivenName' => $this->getGivenName()?->getContent()->getValue(),
             'SurName' => $this->getSurName()?->getContent()->getValue(),

tests/SAML2/XML/md/ContactPersonTest.php

@@ -64,7 +64,7 @@ public static function setUpBeforeClass(): void
         );
 
         self::$arrayRepresentation = [
-            'ContactType' => 'administrative',
+            'contactType' => 'administrative',
             'Company' => 'SimpleSAMLphp',
             'GivenName' => 'Lead',
             'SurName' => 'Developer',