* 'exist-validator-enhancement' of https://github.com/creocoder/yii2: ExistValidator final refactoring. `allowArray` checking also added to `validateValue` method. New tests added New tests added ExistValidator::validateValue() fixed Tests excess dump removed ExistValidator bugfix Tests updated ExistValidator refactoring CHANGELOG updated `allowArray` introduced. CHANGELOG ExistValidator count logic fix Tests updated Tests updated Tests updated Refactoring Refactoring Improve `exist` validator to support array attributes Conflicts: framework/CHANGELOG.md