Fix for err in rejects from GoogleLogin promises being empty object

[Eric-Carlton]

I noticed that when a Promise rejects from a GoogleLogin method, the err returned in the reject is just an empty object. For example:

login.login(username, password).then(token => { //do stuff with token }, err => { console.log(err) //err prints as '{}' });

Changing the Promises to reject with the statusCode and statusMessage of the response at least gives a (reasonably) meaningful error.

I'm not sure if the same thing happens with PTCLogin methods or not. I have not tried them.

[MakuraYami]

Please make sure it always rejects a javascript Error object. You could do reject(Error('err text text'))

This is a common practice and helps knowing what to expect in a catch.

[cyraxx]

Yes, wrap it in Error(..) please and I'll be happy to merge :)

[cyraxx]

👌