Sagepay new integration

[uzaif313]

i am integrating Sagepay api with one of my rails application i am calling all api via faraday gem but is it possible to integrate new Sagepay api with active merchant http://qa-developer-portal-home.sageaccountantscloud.com/payments/api/

[github-actions]

To provide a cleaner slate for the maintenance of the library, this PR/Issue is being labeled stale after 60 days without activity. It will be closed in 14 days unless you comment with an update regarding its applicability to the current build. Thank you!