Update base box in Vagrantfile so composer install/update runs with newer version of PHP in VM
Added vendor dependencies to box.json for phar building
Merge pull request #1484 from ssx/update_vagrantfile_to_newer_version

Update base box in Vagrantfile so composer install/update runs with newer version of PHP in VM
Merge pull request #1486 from MarqD/issue1470

Added vendor dependencies to box.json for phar building
Merge branch 'develop' of https://github.com/phpDocumentor/phpDocumentor2 into develop