feat(api): api update (#443)

Author: stainless-app[bot]

.stats.yml

@@ -1,2 +1,2 @@
 configured_endpoints: 101
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-b6d60f8edbdc94e65f06b0b002cc8e1f27aceccc67917bea849425701ba82fb8.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-52bd3046e73f201c4d08edfa92756791c015be907691a7893f8e7782cc2aea6f.yml

src/resources/invoices.ts

@@ -296,10 +296,9 @@ export interface Invoice {
   discounts: Array<Shared.InvoiceLevelDiscount>;
 
   /**
-   * When the invoice payment is due. The due date is null if the invoice is not yet
-   * finalized.
+   * When the invoice payment is due.
    */
-  due_date: string | null;
+  due_date: string;
 
   /**
    * If the invoice has a status of `draft`, this will be the time that the invoice
@@ -1508,10 +1507,9 @@ export interface InvoiceFetchUpcomingResponse {
   discounts: Array<Shared.InvoiceLevelDiscount>;
 
   /**
-   * When the invoice payment is due. The due date is null if the invoice is not yet
-   * finalized.
+   * When the invoice payment is due.
    */
-  due_date: string | null;
+  due_date: string;
 
   /**
    * If the invoice has a status of `draft`, this will be the time that the invoice