Unexpected token { in wit.js
<p>I am testing wit.ai with the samples provided by fb and I am running in to the following error...</p>

<pre>
/mynodeproj/node_modules/node-wit/lib/wit.js:18
  const {
        ^
        SyntaxError: Unexpected token {
        at exports.runInThisContext (vm.js:53:16)
        at Module._compile (module.js:373:25)
        at Object.Module._extensions..js (module.js:416:10)
        at Module.load (module.js:343:32)
        at Function.Module._load (module.js:300:12)
        at Module.require (module.js:353:17)
        at require (internal/module.js:12:17)
</pre>

<p>I'm very new to node and wit. I used <code>Wit = require('node-wit').Wit;</code> to initialize and installed the node-wit module. Can some one please help?</p>