title: VSCode module.exports autocomplete doesn't work
body: <p>Using latest VSCode version 1.30.2 and it doesn't see the functions that are inside the exported module. </p>
  
  <p>this is in model.js</p>
  
  <pre><code>var userModel = mongoose.model('userModel', usersSchema);
  userModel.isUsernameTaken = isUsernameTaken;
  module.exports = userModel;
  
  function isUsernameTaken(username) {
      return userModel.findOne({username:username});
  }
  </code></pre>
  
  <p>and in app.js</p>
  
  <pre><code>var userModel = require('./model');
  </code></pre>
  
  <p>Now upon typing userModel. in app.js I should see a suggestion for autocompletion of isUsernameTaken, but it's not there and also not any of the functions declared in model are "visible". However if I type the exact function name (case-sensitive). (ex: userModel.isUserNameTaken(etc)) it works. What is wrong ?</p>