Compatibility with PHPSpec v6

Thanks to @ptondereau, we are now compatible with phpspec 6.

A brand new root namespace FriendsOfPhpSpec !

We need to take a step back and take some distance from our old friend LeanPHP. We are gentle people so we maintain the old root namespace for avoiding BC Break…

Moving to a new organisation + PHPSpec v5 support.

Since the old repository is abandoned (check https://github.com/leanphp/phpspec-code-coverage), this release is the first step to an autonomous project in a brand new organization 😄.