Support for codeception framework

[mariusbalcytis]

Codeception is quite popular testing framework for PHP, giving ability to write acceptance and functional tests.

Page objects: https://codeception.com/docs/06-ReusingTestCode#pageobjects
Available locators (probably best to stick to strict ones when generating page object): https://codeception.com/docs/03-AcceptanceTests#click

[danhumphrey]

Hi @mariusbalcytis Thanks for the suggestion, I'm happy to add this to the backlog.