This package is abandoned and no longer maintained. The author suggests using the postfinancecheckout/magento-2-2 package instead.
PostFinance Checkout integration for Magento 2.2
1.0.34 2019-02-19 13:55 UTC
This repository contains the Magento 2.2 extension that enables to process payments with PostFinance Checkout.
To use this extension, a PostFinance Checkout account is required.
Please see the license file for more information.