Add error callback when fetch handles an error

[jkeruzec]

Hello,

I wanted to do this PR that I found useful for my project :
When creating APIClient, provide an errorCallback method that will be called in case of rest fetch error

How to use it :

const handleErrors = (error) => {
    if(error.status === 401)) {
        loginServices.invalidateUser();
        window.location = '/'; 
    }
}
const options = {
     apiPath: apiPath,
     commonOptions: {
         errorCallBack : handleErrors
     }
}
       
return apiClient(adapter, options);

[jkeruzec]

@masylum Any chance to have this integrated to the library ?