Add location_id to FulfillmentFields (#49)

Author: h2akim

src/Enum/Fields/FulfillmentFields.php

@@ -14,6 +14,7 @@ class FulfillmentFields extends AbstractObjectEnum
     const TRACKING_COMPANY = 'tracking_company';
     const TRACKING_NUMBERS = 'tracking_numbers';
     const TRACKING_URLS = 'tracking_urls';
+    const LOCATION_ID = 'location_id';
     const UPDATED_AT = 'updated_at';
     const VARIANT_INVENTORY_MANAGEMENT = 'variant_inventory_management';
 
@@ -30,6 +31,7 @@ public function getFieldTypes()
             'tracking_company' => 'string',
             'tracking_numbers' => 'array',
             'tracking_urls' => 'array',
+            'location_id' => 'integer',
             'updated_at' => 'DateTime',
             'variant_inventory_management' => 'string'
         );