Soap Server Protocol for Cowboy 2

[ghost]

Hi,

I'm using your library for exposing a couple of soap services over Cowboy 2. I noticed that your protocol was out of date with regards to the upgrade method signature provided by Cowboy as well as with the change from cowboy_req:body to cowboy_req:read_body. I've made a change on my forked repo which seems to work perfectly, I was just wondering if you accept pull requests and what you require before you do.

Regards,
Paolo