next-updater has upgraded 6 dependencies

Hi!

I have upgraded dependencies to the latest non-breaking versions

    gulp-util -> 3.0.1
    gulp -> 3.8.10
    jshint-stylish -> 1.0.0
    gulp-jshint -> 1.9.0
    event-stream -> 3.2.1
    gt -> 0.8.47

Truly yours, [next-updater](https://github.com/bahmutov/next-updater)