How to use browserlist with gulp and autoprefixer

Hi,

After updating my gulp system, I get this message when I run it:

Replace Autoprefixer browsers option to Browserslist config.
  Use browserslist key in package.json or .browserslistrc file.

But I don’t find example to convert my actual code to work with these new practices. Here is my starting actual code in gulp.js file:

// Autoprefixer : Navigateurs à cibler pour le préfixage CSS
var AUTOPREFIXER = [

'> 1%',
'ie >= 8',
'edge >= 15',
'ie_mob >= 10',
'ff >= 45',
'chrome >= 45',
'safari >= 7',
'opera >= 23',
'ios >= 7',
'android >= 4',
'bb >= 10'
];

//Tableau pour utiliser les plugins de PostCSS
//https://webdesign.tutsplus.com/tutorials/postcss-quickstart-guide-gulp-setup--cms-24543
var processors = [
  autoprefixer(  {
                                browsers: AUTOPREFIXER,
                                cascade: false,
                                //activation du prefixage pour grid
                                grid: true
                            })
];

What do I need to change to get this work with browserlist now ?

Thanks

[ai]

Open package.json and add:

  "browserslist": [
    "> 1%",
    "ie >= 8",
    "edge >= 15",
    "ie_mob >= 10",
    "ff >= 45",
    "chrome >= 45",
    "safari >= 7",
    "opera >= 23",
    "ios >= 7",
    "android >= 4",
    "bb >= 10"
  ]

Remove browsers: AUTOPREFIXER option and AUTOPREFIXER variable.

[ai]

You can create .browserslistrc instead of editing package.json:

> 1%
ie >= 8
edge >= 15
ie_mob >= 10
ff >= 45
chrome >= 45
safari >= 7
opera >= 23
ios >= 7
android >= 4
bb >= 10