问题图示：
问题原因：
gulp开发团队一直计划弃用gulp-util,因为它只是一堆模块，大概6752个modules,其中许多都使用过了较低版本的Vinyl, 低版本的Vinyl是不兼容的，但仍被许多插件使用，然而Vinyl的v2版不会附带gulp-util，所以开发团队在我们下载gulp-util包时，或者并不是你直接下载但你别的包需要依赖gulp-util而间接下载时，他们都会给我们这个警告。尽管这个警告不那么紧急，但我们也应尽快解决。
修复步骤：
1.运行npm ls gulp-util以获取依赖于它的插件列表。
2.对于每个相关插件，运行npm issues {PLUGIN NAME}将打开问题跟踪器。
3.依次安装下面的命令来修复各个插件
- gutil.File=> npm i vinyl
- gutil.replaceExtension=> npm i replace-ext
- gutil.colors=> npm i ansi-colors
- gutil.date=> npm i date-format
- gutil.log=> npm i fancy-log
- gutil.template=> npm i lodash.template
- gutil.env=> npm i minimist
- gutil.beep=> npm i beeper
- gutil.noop=> npm i through2
- gutil.combine=> npm i multipipe
- gutil.buffer=> npm i list-stream
- gutil.PluginError=> npm i plugin-error
补充：
可以打开后面的链接，来看关于包的详情。
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