Migrate to Google's OpenID Connect

[mohno007]

It is needed to change an authentication method of Google due to the shutdown of Google+ API.

A stable version of Skinny Framework doesn't support APIs of Google's OpenID Connect.
The next release of Skinny will include it.
skinny-framework/skinny-framework#401

[seratch]

Sorry! Will release a new version soon.

[seratch]

@mohno007 version 3.0.2 is available now. Please check it out when you have time.

[mohno007]

@seratch
Thank you for a release of new version and cooperation! I'll update scuruto dependencies.