Add root path to options

[thenengah]

#7

Fix for this issue.

babelRegister({
  cache: false,
  extensions: ['.js'],
  presets: [
    ['@babel/preset-env'],
    ['@babel/preset-react']
  ],
  plugins: [
    ['@babel/plugin-transform-runtime'],
    ['babel-plugin-transform-require-ignore', {
      extensions: ['.css', '.scss']
    }],
    ['babel-plugin-file-loader', {
      rootPath: '../',
      publicPath: '/dist',
      outputPath: '/public/dist'
    }]
  ]
})

Example usage with @babel/register