Edx-auth-backends

------------------

Add logout_url property to EdXOAuth2 backend.

------------------

Remove token validation from EdXOAuth2 backend.

------------------

Added support to update email address.

social_core consider email field protected and won't let it change.
Added a pipeline function to update email address.

------------------

Updated LoginRedirectBaseView to include querystring

[unlisted]
----------

Intervening releases not documented here; see Releases:

https://github.com/openedx/auth-backends/releases?after=1.1.2

------------------

- Update required version of Python Social Auth to 0.2.3.

------------------

- Update required version of Python Social Auth to 0.2.2.