old_contents: const baseRules = [
      'eslint:recommended',
  ].concat([
      '../src/rules/ava',
      '../src/rules/best-practices',
      '../src/rules/errors',
      '../src/rules/es6',
      '../src/rules/imports',
      '../src/rules/jsdoc',
      '../src/rules/node',
      '../src/rules/react',
      '../src/rules/strict',
      '../src/rules/style',
      '../src/rules/variables',
  ].map(require.resolve))
  
  module.exports = {
      parser: 'babel-eslint',
      env: {
          node: true
      },
      extends: baseRules,
      parserOptions: {
          ecmaVersion: 7,
          sourceType: 'module',
      }
  }
new_contents: const baseRules = [
      'eslint:recommended',
  ].concat([
      '../src/rules/ava',
      '../src/rules/best-practices',
      '../src/rules/errors',
      '../src/rules/es6',
      '../src/rules/imports',
      '../src/rules/jsdoc',
      '../src/rules/node',
      '../src/rules/react',
      '../src/rules/strict',
      '../src/rules/style',
      '../src/rules/variables',
  ].map(require.resolve))
  
  module.exports = {
      parser: 'babel-eslint',
      env: {
          node: true,
          browser: true,
      },
      extends: baseRules,
      parserOptions: {
          ecmaVersion: 7,
          sourceType: 'module',
      },
  }
subject: Add env browser for browser globals support