Packages and Startup for WebAPI 2.2 on Owin + IIS hosting

packages.json

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net461" />
  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net461" />
  <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net461" />
  <package id="Owin" version="1.0" targetFramework="net461" />
</packages>

Startup.cs

[assembly: OwinStartup(typeof(Startup))]

namespace Api
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            var config = new HttpConfiguration();

            config.MapHttpAttributeRoutes();

            config.Formatters.Remove(config.Formatters.XmlFormatter); 
            config.Formatters.JsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver(); 

            app.UseWebApi(config);
        }
    }
}