Jun 23, 2017
Yii team released three official extensions.
In Auth Client, besides bugfixes, there are some new features. OpenID Connect support was added as well as OAuth2-authentication via JSON Web Token (JWT). Token exchange was implemented for Facebook.
Github Link for yii2-auth-client:
Are the versions 2.0.x and 2.1.x not compatible?
Yes. There are some breaks in 2.1: https://github.com/yiisoft/yii2-authclient/blob/master/UPGRADE.md