Fails on some selectors with pseudo-elements

[dryabov]

CSS processing fails on selectors like .table > :not(caption) > *, because after removing of pseudos it's transformed into an invalid selector: .table > > *.

Currently I've fixed it by using

        matchingElements = query(pseudolessSelector.replace(/(?<=[>+~])\s+(?=[>+~]|$)/g, ' * '));

but it looks like a dirty hack way (e.g. it may corrupt quoted strings in attributes).

The better solution is to check the type of pseudo.prev() in the transformSelector and, if necessary, insert * node (via replaceWith) instead of just remove.