Google refreshAuthToken() doesn't refresh idToken

[andrei-lifchits]

I'm seeing this behaviour in both my code using this library and in the demo app provided in this repository: when calling refreshAuthToken(), the subscriber to the authState receives a new SocialUser object, but the idToken inside the new user object stays the same. Because this idToken expires after 1 hour, and refreshAuthToken() does not actually fetch a new idToken, my backend rejects the JWT as expired. Looking at the library code, I see that all it does in refreshAuthToken() is call the .revoke endpoint on Google, which doesn't sound like an action that would lead to refreshing of any tokens. Am I missing something here?

[lwestfall]

I'm going to attempt a PR on this this week. There's quite a few issues with the google provider that make it borderline unusable