fix: fix api version

src/sections/shipment-invoicing.ts

@@ -1,16 +1,20 @@
 import { HttpClient, Resource } from '../http'
 import { getServiceStatusByResource } from './shared'
 
-const SELLERS_API_VERSION = '2018-11-01'
-
+/**
+ * The first API version is what's written in the folder name
+ * but the second one is what's used in the request examples
+ */
+// const SHIPMENT_INVOICING_API_VERSION = '2018-11-01'
+const SHIPMENT_INVOICING_API_VERSION = '2018-09-01'
 export class ShipmentInvoicing {
   constructor(private httpClient: HttpClient) {}
 
   async getServiceStatus() {
     return getServiceStatusByResource(
       this.httpClient,
       Resource.ShipmentInvoicing,
-      SELLERS_API_VERSION,
+      SHIPMENT_INVOICING_API_VERSION,
     )
   }
 }