function clean(cb) {
  return del([paths.lib.dest, paths.mocks.dest]);
}
/*.js',
    ],
    dest: 'lib',
    presetOptions: {
      stripDEV: true,
      rewriteModules: {
        map: require('fbjs-scripts/third-party-module-map'),
      },
    },
  },
  mocks: {
    src: [
      'src/*