.postcssrc

{
  "plugins": {
    "autoprefixer": {
      browsers: [
        'Safari >= 8',
        'ie >= 10',
        'last 2 Chrome versions',
        'last 2 Firefox versions',
        'Edge >= 13',
        'ios_saf >= 8',
        'ie_mob >= 11',
        'Android >= 4'
      ],
      cascade: false,
      add: true,
      remove: true
    }
  }
}