title: nodejs which package to install "=>" lambda for parse-server
body: <p>i need to install parse-server and when i execute main.js this exceptions always occured </p>
  
  <pre><code>request(options, (error, response, body) =&gt; {
                                                ^
  SyntaxError: Unexpected token &gt;
      at Module._compile (module.js:439:25)
      at Object.Module._extensions..js (module.js:474:10)
      at Module.load (module.js:356:32)
      at Function.Module._load (module.js:312:12)
      at Module.require (module.js:364:17)
      at require (module.js:380:17)
      at Object.&lt;anonymous&gt; (/home/hilman/e.js:2:19)
      at Module._compile (module.js:456:26)
      at Object.Module._extensions..js (module.js:474:10)
      at Module.load (module.js:356:32)
  </code></pre>
  
  <p>and also this one </p>
  
  <pre><code>return results.map(r =&gt; r.relatedId);
                           ^
      SyntaxError: Unexpected token &gt;
          at Module._compile (module.js:439:25)
          at Object.Module._extensions..js (module.js:474:10)
          at Module.load (module.js:356:32)
          at Function.Module._load (module.js:312:12)
          at Module.require (module.js:364:17)
          at require (module.js:380:17)
          at Module._compile (module.js:456:26)
          at Object.Module._extensions..js (module.js:474:10)
          at Module.load (module.js:356:32)
  </code></pre>
  
  <p>which npm packages should i install to make parse-server work in my server?</p>