Safari: Google API doesn't detect that we're logged in

[lorennorman]

Describe the bug
For most browsers, a logged in user is sent directly to their games list. On Safari, this doesn't happen. It seems like it is related to the Google API library not being able to tell that we are in fact logged in.

To Reproduce

1. Log into Paperize on Safari
2. Close the tab, open a fresh one, navigate to https://beta.editor.paperize.io (or even https://beta.editor.paperize.io/#/games
3. See the splash screen with "Sign In" button at the top

Expected behavior
Opening a new Paperize tab in Safari after signing in should know that we are signed in automatically.

Additional context

• Investigate with Update Google Sign-in #119
• Reported by Discord user @darken#3138