title: How to use stylelint with Grunt?
body: <p>I'm trying to replace <a href="https://github.com/ahmednuaman/grunt-scss-lint" rel="nofollow noreferrer">grunt-scss-lint</a> (because of its Ruby dependency and silent failure when you don't have the gem installed) with <a href="http://stylelint.io/" rel="nofollow noreferrer">stylelint</a>.</p>
  
  <p>The problem I'm running into is the following error:</p>
  
  <pre><code>$ grunt                                                                        
  Loading "Gruntfile.js" tasks...ERROR
  &gt;&gt; ReferenceError: Map is not defined
  </code></pre>
  
  <p>I assume this is because stylelint (which is a PostCSS plugin, not a Grunt plugin) requires ES6.</p>
  
  <p><a href="https://github.com/stylelint/stylelint/blob/master/src/rules/indentation/index.js#L22" rel="nofollow noreferrer">Here's the code that's throwing the <code>Map is not defined</code> error.</a></p>
  
  <p>Is there any way to get this to work where I can just run <code>grunt</code> and not some weird workaround <a href="https://stackoverflow.com/a/17751775/96257">like this</a>?</p>