v0.5.2

Fixed

• An element named * — written with an escape, as \2a — is no longer
  translated as the universal selector when a namespace constraint is written
  in front of it. An escape only ever produces an <ident> (css-syntax-3
  §4.3.7), so \2a is a type selector whose name happens to be the character
  *; only the delimiter * is the universal selector (Selectors 4
  §5.1–5.2). The translator told the two apart by comparing the
  name to "*", which read *|\2a as *|* (every element in the document,
  where the selector asks for elements named * in any namespace) and |\2a
  as |* (every element in no namespace). They are now *[local-name() = '*']
  and *[name() = '*' and namespace-uri() = ''], matching what the unprefixed
  \2a and the prefixed ns|\2a already produced. For the same reason
  *|\2a:first-of-type — refused as "an of-type pseudo-class on the universal
  selector *" — now translates, counting siblings by the name as any other
  type selector does. The universal selector itself is unchanged in every
  namespace form (*, |*, *|*, ns|*), and \2a in the prefix
  position is still "a namespace prefix that is not an XPath name (*)".