updated stripe types, added unit_label in products

types/stripe/index.d.ts

@@ -16,6 +16,7 @@
 //                 Simon Schick <https://github.com/SimonSchick>
 //                 Slava Yultyyev <https://github.com/yultyyev>
 //                 Corey Psoinos <https://github.com/cpsoinos>
+//                 Saransh Kataria <https://github.com/saranshkataria>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
@@ -3383,6 +3384,12 @@ declare namespace Stripe {
              * May only be set if type=service.
              */
             statement_descriptor?: string;
+
+            /**
+             * A label that represents units of this product, such as seat(s), in Stripe and on customers’ receipts and invoices.
+             * Only available on products of type=service.
+             */
+            unit_label?: string;
         }
 
         interface IProductUpdateOptions extends IDataOptionsWithMetadata {