old_contents: module.exports = {
    root: true,
    'extends': [
      'plugin:vue/essential',
      '@vue/standard'
    ],
    rules: {
      // allow async-await
      'generator-star-spacing': 'off',
      // allow debugger during development
      'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
      'vue/no-parsing-error': [2, { 'x-invalid-end-tag': false }]
    }
  }
  
new_contents: module.exports = {
    root: true,
    'extends': [
      'plugin:vue/essential',
      '@vue/standard'
    ],
    rules: {
      // allow async-await
      'generator-star-spacing': 'off',
      // allow debugger during development
      'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
      'vue/no-parsing-error': [2, { 'x-invalid-end-tag': false }],
      'no-undef': 'off'
    }
  }
  
subject: update eslintrc.js