Allow CSS selectors with colons

[rauwebieten]

Emogrify throws exceptions when colons are used in a CSS3 selector.
They are converted to an invalid xpath predicate.

Example:

$html = '
    <a href="https://example.com">example.com</a>
';

$css = '
    a[href^="https:"] {
        color: orange;
    }
';

$emogrifier = new \Pelago\Emogrifier();
$emogrifier->setCss($css);
$emogrifier->setHtml($html);

print $emogrifier->emogrify();

When just using a[href^="https"] (without the colon) there are no problems.