Symfony 4 compatibility

[st0at]

When I try to install bundle I get

composer require --dev voryx/restgeneratorbundle
Using version ^0.4.0 for voryx/restgeneratorbundle
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - sensio/generator-bundle v3.1.7 requires symfony/framework-bundle ~2.7|~3.0