Merge remote-tracking branch 'origin/main' into release/v2.2.0

Author: nicocedron

_build/api.yaml

@@ -15599,7 +15599,6 @@ components:
         expires_at:
           example: 1553273553
           format: int64
-          nullable: true
           type: integer
         reason:
           description: Reason for the refund

requestBodies/orders/order_refunds_request.yml

@@ -2,19 +2,18 @@ description: requested field for a refund
 required: true
 content:
   application/json:
-    schema:  
+    schema:
       required:
         - amount
         - reason
       properties:
-        amount: 
+        amount:
           type: integer
           example: 500
           description: "Amount to be refunded in cents"
         expires_at:
           type: integer
           example: 1553273553
-          nullable: true
           format: int64
         reason:
           type: string