Update phan/phan requirement from ^2.4 to ^2.4 || ^3.0
Updates the requirements on [phan/phan](https://github.com/phan/phan) to permit the latest version. - [Release notes](https://github.com/phan/phan/releases) - [Changelog](https://github.com/phan/phan/blob/master/NEWS.md) - [Commits](https://github.com/phan/phan/compare/2.4.0...3.0.0)