Change getSiteLinks() to getSiteLinkList()

Item::getSiteLinkList() was added and Item::getSiteLinks() deprecated in
version 0.8.0 (2014-06-05) of the Wikibase data model, and the
deprecated method was finally removed in version 8.0.0 (2018-08-03).

Author: lucaswerkmeister

src/EntityImporter.php

@@ -152,7 +152,7 @@ private function getBadgeItems( array $entities ) {
 				continue;
 			}
 
-			foreach( $entity->getSiteLinks() as $siteLink ) {
+			foreach( $entity->getSiteLinkList() as $siteLink ) {
 				foreach( $siteLink->getBadges() as $badge ) {
 					$badgeItems[] = $badge->getSerialization();
 				}