Enhance remember me with new Userbase functionality

[raae]

This will solve discussion in #126

As of now users are only logged in for a little over 24 hours, then they have to log in. We want them to be logged in for a week, and every time they come back to the app (even without signing in) it should be extended for a week.

Session length is in hours, so make sure to get 7 days in hours as the value.

Relevant code to be found in features/auth

• Update the userbase package
• Add sessionLength to userbase.init (https://userbase.com/docs/sdk/init/)
• Add sessionLength to userbase.signIn and userbase.singUp (https://userbase.com/docs/sdk/sign-in/, https://userbase.com/docs/sdk/sign-up/)

[raae]

A good one to grab @olavea