title: Unable to press enter using nightwatch
body: <p>I am trying to press ENTER using nightwatch using below code in my test</p>
  
  <pre><code>module.exports = {
  'Enter Text'(client) {
    client
    .url(url)
    .waitForElementVisible('element', 1000)
    .setValue('input[id="new-todo"]', ['abcdefgh', client.Keys.ENTER])
    .pause(10000)
    .end();
  </code></pre>
  
  <p>it opens chrome browser, sets the value but does not press ENTER. My application needs this to be done as pressing enter is the only option.</p>
  
  <p>Below is the HTML code for the part I am trying to automate</p>
  
  <pre><code> &lt;header id="header"&gt;
  &lt;h1&gt;todos&lt;/h1&gt;
  &lt;input id="new-todo" disabled placeholder="What needs to be done?" autofocus data-weave="troopjs-todos/widget/create"&gt;
  &lt;/header&gt;
  </code></pre>