4.4

Pull request for 4.4.

4.4: [![Build Status](https://travis-ci.org/mnapoli/PHP-DI.svg?branch=4.4)](https://travis-ci.org/mnapoli/PHP-DI) [![Coverage Status](https://coveralls.io/repos/mnapoli/PHP-DI/badge.png?branch=4.4)](https://coveralls.io/r/mnapoli/PHP-DI?branch=4.4) [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/mnapoli/PHP-DI/badges/quality-score.png?b=4.4)](https://scrutinizer-ci.com/g/mnapoli/PHP-DI/?branch=4.4)

master: [![Build Status](https://travis-ci.org/mnapoli/PHP-DI.svg?branch=master)](https://travis-ci.org/mnapoli/PHP-DI) [![Coverage Status](https://coveralls.io/repos/mnapoli/PHP-DI/badge.png?branch=master)](https://coveralls.io/r/mnapoli/PHP-DI?branch=master) [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/mnapoli/PHP-DI/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/mnapoli/PHP-DI/?branch=master)