Gulp Autoprefixer - "gulp-autoprefixer"

gulpfile.js

var gulp = require('gulp'),
    autoprefixer = require('gulp-autoprefixer');

gulp.task('prefijos', function(done){

  gulp.src('./src/style.css')
      .pipe(autoprefixer({
        overrideBrowserslist: ['last 4 versions'],
        flexbox : true,
        grid : true
      }))
      .pipe(gulp.dest('./dist'));
    
  done();
});