'babel': {
      sourceMaps: 'inline',
      exclude: [
        'transform-es2015-arrow-functions',
        'transform-es2015-block-scoped-functions',
        'transform-es2015-block-scoping',
        'transform-es2015-classes',
        'transform-es2015-computed-properties',
        'transform-es2015-destructuring',
        'transform-es2015-duplicate-keys',
        'transform-es2015-function-name',
        'transform-es2015-for-of',
        'transform-es2015-literals',
        'transform-es2015-object-super',
        'transform-es2015-parameters',
        'transform-es2015-shorthand-properties',
        'transform-es2015-spread',
        'transform-es2015-sticky-regex',
        'transform-es2015-template-literals',
        'transform-es2015-typeof-symbol',
        'transform-es2015-unicode-regex',
        'transform-regenerator',
      ],
    },