fix deps


Fixing dependency reference to work without yeoman.

Ponting to yeoman/generators master branch.

cc @sindresorhus I have the same commit ready for every generator repo. I would need to either do a PR for each one, or commit directly to each repo if that sounds good to you. https://github.com/mklabs/generators/branches branches are `generator-*`

This is a required step to finish up the ongoing work and refactoring on the generators repo.