silexphp/Silex — pull request #1039 by henrikbjorn (2014-10-12 12:03:02+00:00)
Title: Remove PHPUnit as a development dependency

This will make it more inline with how Symfony uses PHPUnit and already
considers this a tool installed when developing.

for reference as PR that rejects having phpunit as dependency in symfony
https://github.com/symfony/symfony/issues/12136