old_contents: module.exports = {
      "extends": "google",
  
      "rules": {
        "no-unused-expressions": [
          2,
          {
            allowShortCircuit: true,
            allowTernary: true
          }
        ],
        "space-before-function-paren": [2, "always"]
      }
  };
  
new_contents: module.exports = {
      "extends": "google",
      "ecmaFeatures": {
        "modules": true,
      },
      "env":{
        "amd": true,
        "browser": true,
        "es6": true,
        "jquery": true,
        "node": true,
      },
      "rules": {
        "no-unused-expressions": [
          2,
          {
            allowShortCircuit: true,
            allowTernary: true
          }
        ],
        "space-before-function-paren": [2, "always"]
      }
  };
  
subject: add es6 rules