gulp-util is deprecated

[anselmbradford]

gulp-util is a project dependency, but it is deprecated.
See https://medium.com/gulpjs/gulp-util-ca3b1f9f9ac5

[alvinlin123]

I will try to find some time this or next week to migrate off gulp-util.

There's already a pull request for it. See #44.

[alvinlin123]

Ah okay, didn't realize it. Thanks for pointing it out.

[alvinlin123]

PR merged, will find some time to release it.