How to generate nuget package from Xamarin.iOS binding project?

I have created a Xamarin.iOS binding project by adding UnityFramework.framework as Native References. When I build this binding project it generstes a .dll file. Now I want to generate a Nuget package and for my actual project I need to add this nuget package instead of the DLL. I did read this but not clear how to apply it for my existing binding project. Please help me on how to create a nuget package from my biding project. Thank you very much.