End Of Life Sisow

Hi Tim,

It's suggested already in the Features Requests topic, but it seems that the Sisow payment integration will not work anymore in the near future. The company Sisow doesn't exist anymore. Mollie is a very widely accepted and one of the largest used payment providers in Europe, and also in the Netherlands where I do a lot of business. And it has very good integrations with a lot of accounting apps and administrative services.

The developers page of Mollie can be found here: https://docs.mollie.com/docs/getting-started

Hope I can put this on your radar, because the Sisow iDeal option isn't guaranteed to work anymore.