fix(docs): include scope parameter in login method documentation

[QuentinBrosse]

Is it possible to specify additional OAuth 2.0 scopes in the login function ?

Something like this:

props.firebase.login({
  provider: 'google',
  type: 'popup',
  scopes: ['email', 'public_profile', 'user_friends']
})

I can't find anything who speak about it in the documentation and the issues.
Thanks a lot :)

[prescottprue]

Yes, it works exactly as you indicated (passing an array or string to scopes parameter). The email scope is included by default.

I didn't realize it wasn't covered clearly in the login method docs. I'll update that, thanks for reaching out.

[prescottprue]

Included as part of the v2.0.2 release.

Let me know if you think anything else should be added to make it more clear.