Broken after vinyl-fs@^3

[secondfry]

https://github.com/gulpjs/vinyl-fs/issues/288

Updating dependencies to modern ones seems to fix the issue.

  "dependencies": {
    "event-stream": "^3.1.7",
    "streamqueue": "^0.1.3",
    "through2": "^0.4.2",
    "vinyl-fs": "^3.0.2"
  },

[urish]

Fixed by #15