resolve parses Downlevel-revealed and valid version

[Scrum]

• Downlevel-revealed Conditional Comments

<![if !IE]><p>You are not using Internet Explorer.</p><![endif]>

after htmlparser2 return

{ tag: 'p',
  content: [ 'You are not using Internet Explorer.' ] }

• Valid Downlevel-revealed Conditional Comments

<!--[if !IE]>--><link href="non-ie.css" rel="stylesheet"><!--<![endif]-->
<!--[if gte IE 7]><!--><p>This is shown in downlevel browsers and IE7 or later.</p><!--<![endif]-->

after htmlparser2 return

1: '<!--[if !IE]>-->',
2: { tag: 'link',
     attrs: { href: 'non-ie.css', rel: 'stylesheet' } },
3: '<!--<![endif]-->'
4: '<!--[if gt IE 6]><!-->'
5: 'This code displays on non-IE browsers and on IE 7 or higher.'
6: '<!--<![endif]-->'

[Scrum]

this can be solves the problem