Update class broken

[leodido]

Tests are broken because of an Zend\Stdlib\PriorityList object used into Zend\Db\Sql\Update class (extended by our Update class).

Please investigate if it is our fault o ZF2 sub-component dependencies fault.

[leodido]

Interface of Zend\Db\Sql\Update has changed in the 2.3 version of ZF2.

Since in the composer.json ZF2 related dependecies are required to be ">=2.2" their 2.3 version is installed by composer.