Fixes #4253 fixed phpdoc
User attributes requesting at GoogleOAuth switched to Google+ API
Merge branch 'master' of github.com:yiisoft/yii2
User attributes fetching at `VKontakte` adjusted
Request HTTP headers argument added to `yii\authclient\BaseOAuth::api()` method
Method `yii\authclient\BaseOAuth::mergeCurlOptions()` advanced to merge array values
Adjusted phpdoc
`yii\authclient\InvalidResponseException` added
Merge branch 'master' of github.com:yiisoft/yii2
`yii\mongodb\Collection::buildLikeCondition()` fixed to escape regular expression.
`yii\mongodb\Collection::buildRegexCondition()` added.
Issue #2337 added to CHANGELOG
Codeceoption adjustments

- Removed hacks since these are no longer required: https://github.com/Codeception/Codeception/commit/71db233985531f298264dc4ca0160d2aa1c83b7f
- Removed unused helper classes
- Added 2.0 style "actor" to config

Thanks to @Ragazzo and @DavertMik for helping with it.