.babelrc

{
  presets: [
    ['env', {
      targets: {
        firefox: 47,
        useBuiltIns: true,
      },
      modules: false,
    }],
    'react'
  ],
  plugins: [
    'transform-object-assign',
    'transform-es2015-destructuring',
    'transform-object-rest-spread',
    'transform-class-properties',
    'transform-exponentiation-operator',
  ],
  env: {
    test: {
      presets: [
        'env',
        'react'
      ],
      plugins: [
        'transform-object-assign',
        'transform-es2015-destructuring',
        'transform-object-rest-spread',
        'transform-class-properties',
        'transform-exponentiation-operator',
      ],
    },
    production: {
      plugins: [
        'transform-react-remove-prop-types',
        'transform-object-assign',
        'transform-es2015-destructuring',
        'transform-object-rest-spread',
        'transform-class-properties',
        'transform-exponentiation-operator',
      ]
    }
  }
}