title: Stylelint, have an empty line before non-nested rules and no empty line before nested rules?
body: <p>Is there any way at all to accomplish this now?</p>
  
  <p>I see rule-nested-empty-line-before has been removed for some reason, so is this config no longer possible?</p>
  
  <p>I want this to throw errors...</p>
  
  <pre><code>@media (max-width: 300px) {
  
      .foo {
          display: block;
      }
  }
  @media (max-width: 600px) {
      .bar {
          display: block;
      }
  }
  </code></pre>
  
  <p>There should be a space before @media since it's not nested, and no space before .foo since it's nested.</p>