Updates to user should not update memoized getAccessToken* methods

[adamjmcgrath]

Description

Updates to the user from the Authorization Server should not require updates to the getAccessToken* memoized methods. (Thanks for the suggestion @xepps)

References

fixes #210

Testing

• add a side effect that depends on getAccessTokenSilently, eg useEffect(() => console.log('changed'), [getAccessTokenSilently])
• login
• make a change to your user (eg name) in the tenant dashboard
• call getAccessTokenSilently({ ignoreCache: true })
• anything rendering the user name should change, but the side effect should not be called

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not master