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

  Using \`browsers\` option can cause errors. Browserslist config can
  be used for Babel, Autoprefixer, postcss-normalize and other tools.

  If you really need to use option, rename it to \`overrideBrowserslist\`.

  Learn more at:
  https://github.com/browserslist/browserslist#readme