create.rb in mollie-api-ruby-4.1.5

- old
+ new

@@ -2,7 +2,8 @@
   customer_id: 'cst_5a2pPrwaWy',
   amount:      { value: '20.00', currency: 'EUR' },
   times:       4,
   interval:    '3 months',
   description: 'Quarterly payment',
-  webhook_url: 'https://webshop.example.org/payments/webhook/'
+  metadata:    { my_field: 'value' },
+  webhook_url: 'https://webshop.example.org/payments/webhook/',
 )