Update django-allauth to 0.31.0

[pyup-bot]

There's a new version of django-allauth available.
You are currently using 0.30.0. I have updated it to 0.31.0

These links might come in handy: PyPI | Changelog | Repo

Changelog

0.31.0

---

Note worthy changes

• Added a new user_logged_out signal.

• OpenId: Added support for requesting additional data.

• New providers: Auth0, Box, Line, Naver, Kakao, Daum, MailChimp, Eventbrite.

Backwards incompatible changes

• Django 1.7 / Python 3.2 compatibility has been dropped.

• Due to providers being registered in the same file as their definition
  it was impossible to subclass a provider without having the parent be
  registered. This has been addressed. If you have implemented a custom
  provider, you will need to change
  providers.registry.register(CustomProvider)
  into
  provider_classes = [CustomProvider].

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[pyup-bot]

Closing this in favor of #125