The pull requests fails because of PHP 5.5 version. The latest codeception version and it's dependencies require PHP 5.6.

We need to find a solution for that. Either separate command line php version and apache one or dropping PHP 5.5 support and go for PHP 7 instead. (So we stick to two versions).

No the issue is you've committed a lock file with PHP 5.6+ dependencies. Codeception's dependencies are PHP 5.4+ but it supports PHPUnit 4.8 and 5.x (5.x has PHP 5.6 as a minimum dependency). The composer.json file will most likely need a config.platform.php key specifying a specific PHP version to use for checking dependencies to ensure this doesn't happen going forward.

@mbabker Sure adding php 5.5 as platform to the composer.json would fix it. But is this also the way to go? Should we stick to PHP 5.5? :-)

Using config.platform.php is the way to go if you're committing a lock file on a distributed project. For example the CMS has a 5.3.10 minimum but I work locally on 7.0 so to ensure the dependencies for the CMS aren't accidentally raised either you'd have to use rather strict version constraints in your require/require-dev sections, always run updates from a machine having your minimum requirements, or set the config.platform.php key which tells Composer to ignore your environment's PHP version and always use the one you specify in the key.

Okay, thank you for your input on that @mbabker ????