Log Message:
Update to lucid-2.11.0

2.11.0
* Change internal attributes to Seq Attribute. This preserves
  ordering. Attributes are merged in a left-biased way, preserving the key
  order as first encountered.

2.9.13
* Change internal attributes representation from HashMap to Map. This
  introduces stable ordering, at a negligible performance cost for
  realistic element sizes. This may affect some test suites.
* doctype no longer accepts attributes. You can use with with doctypeHtml
  now, if needed.