Fixed declaration error

Fixed declation error.

```
Fatal error: Declaration of Phalcon\Db\Adapter\Pdo::__construct() must be compatible with Phalcon\Db\AdapterInterface::__construct($descriptor) in Unknown on line 0
Fatal error: Declaration of Phalcon\Db\Index::__construct() must be compatible with Phalcon\Db\IndexInterface::__construct($indexName, $columns, $type) in Unknown on line 0
Fatal error: Declaration of Phalcon\Db\Index::__set_state() must be compatible with Phalcon\Db\IndexInterface::__set_state($data) in Unknown on line 0
Fatal error: Declaration of Phalcon\Db\Reference::__construct() must be compatible with Phalcon\Db\ReferenceInterface::__construct($referenceName, $definition) in Unknown on line 0
Fatal error: Declaration of Phalcon\Db\Reference::__set_state() must be compatible with Phalcon\Db\ReferenceInterface::__set_state($data) in Unknown on line 0
Fatal error: Declaration of Phalcon\Di\Service::__set_state() must be compatible with Phalcon\Di\ServiceInterface::__set_state($attributes) in Unknown on line 0
Fatal error: Declaration of Phalcon\Mvc\Model\Criteria::bind() must be compatible with Phalcon\Mvc\Model\CriteriaInterface::bind($bindParams) in Unknown on line 0
Fatal error: Declaration of Phalcon\Mvc\Model\Criteria::bindTypes() must be compatible with Phalcon\Mvc\Model\CriteriaInterface::bindTypes($bindTypes) in Unknown on line 0
Fatal error: Declaration of Phalcon\Mvc\Model\Criteria::inWhere() must be compatible with Phalcon\Mvc\Model\CriteriaInterface::inWhere($expr, $values) in Unknown on line 0
Fatal error: Declaration of Phalcon\Mvc\Model\Criteria::notInWhere() must be compatible with Phalcon\Mvc\Model\CriteriaInterface::notInWhere($expr, $values) in Unknown on line 0
Fatal error: Declaration of Phalcon\Mvc\Model\Criteria::fromInput() must be compatible with Phalcon\Mvc\Model\CriteriaInterface::fromInput($dependencyInjector, $modelName, $data) in Unknown on line 0
Fatal error: Declaration of Phalcon\Paginator\Adapter\QueryBuilder::__construct() must be compatible with Phalcon\Paginator\AdapterInterface::__construct($config) in Unknown on line 0
```