gulp-util is deprecated.

[King-Kyle]

Remove gulp-util using the following API replacements:

gutil.File => https://www.npmjs.com/package/vinyl

gutil.replaceExtension => The .extname property on Vinyl objects or https://www.npmjs.com/package/replace-ext

gutil.colors => https://www.npmjs.com/package/ansi-colors

gutil.date => https://www.npmjs.com/package/date-format

gutil.log => https://www.npmjs.com/package/fancy-log

gutil.template => https://www.npmjs.com/package/lodash.template

gutil.env => https://www.npmjs.com/package/minimist

gutil.beep => https://www.npmjs.com/package/beeper

gutil.noop => https://www.npmjs.com/package/through2

gutil.isStream => Use the .isStream() method on Vinyl objects

gutil.isBuffer => Use the .isBuffer() method on Vinyl objects

gutil.isNull => Use the .isNull() method on Vinyl objects

gutil.linefeed => Use the string '\n' in your code

gutil.combine => https://www.npmjs.com/package/multipipe

gutil.buffer => https://www.npmjs.com/package/list-stream

gutil.PluginError => https://www.npmjs.com/package/plugin-error