Use PHP7 syntax (#660)

Author: Nyholm

Model/Address.php

@@ -236,9 +236,9 @@ public static function createFromArray(array $data)
         $adminLevels = [];
         foreach ($data['adminLevels'] as $adminLevel) {
             $adminLevels[] = new AdminLevel(
-                isset($adminLevel['level']) ? $adminLevel : null,
-                isset($adminLevel['name']) ? $adminLevel : null,
-                isset($adminLevel['code']) ? $adminLevel : null
+                $adminLevel['level'] ?? null,
+                $adminLevel['name'] ?? null,
+                $adminLevel['code'] ?? null
             );
         }