The attribute 'round_off_amount' have been added in Invoice an Credit note resources.
See : https://apidocs.chargebee.com/docs/api/invoices#invoice_attributes

The attribute 'settled_at' has been added to transaction resource.
See : https://apidocs.chargebee.com/docs/api/transactions#transaction_attributes

'Collect now' API in Hosted pages resource has been undeprecated.
See : https://apidocs.chargebee.com/docs/api/hosted_pages#collect_now