old_contents: 'use strict';
  
  module.exports = {
      "extends": [
          "./env/default.js",
          "./env/node.js",
          "./version/es2019.js",
          "./module/node.js",
          "./rules/strict.js",
          "./rules/node-14.js"
      ]
  };
  
new_contents: 'use strict';
  
  module.exports = {
      "extends": [
          "./env/default.js",
          "./env/node.js",
          "./version/es2020.js",
          "./module/node.js",
          "./rules/strict.js",
          "./rules/node-14.js"
      ]
  };
  
subject: use ES2020 config for Node.js 14