Improve `exist` validator to support array attributes
Refactoring
Refactoring
Update config.php
BaseVarDumper::export() added
Doc comments for `BaseVarDumper::export()` added
Issue #3232 added to CHANGELOG
Object handling at `BaseVarDumper::export()` reworked
Tests updated
Tests updated
MigrateCommand enhancement. `all` option added for `down` action.
CHANGELOG updated
Comments updated
Tests updated
ExistValidator count logic fix
CHANGELOG
CHANGELOG fixed
`allowArray` introduced.
CHANGELOG updated
ExistValidator refactoring