yrby 0.8.1

Added

• unknown_types on Y::Lexical and Y::ProseMirror, and so on Y::Lexxy
  and Y::Tiptap. It lists the node types in a document that neither the
  built-in schema nor a rule handles, which are the ones to_html can't fully
  render. Render a real document from your editor in a test and assert the list
  is empty.
• The renderer crates export escape_text and escape_attr for callers that
  build their own markup (lexical-yjs-html 0.1.4, prosemirror-yjs-html
  0.1.5).

Changed

• The demo app and the render-parity test run on Lexxy 1.0. Y::Lexxy
  output matches Lexxy 1.0's own value, including image alt text edited
  after the document syncs.

Fixed

• The Lexical renderers keep the text of an unknown inline wrapper, such as a
  mark with no rule. The text renders without the wrapper. Before, the whole
  node rendered as nothing, so its text was missing from the HTML.
• Y::Lexxy's list-item rule escapes the stored __checked and __value
  attributes. Collaborators write those attributes, and a crafted value could
  break out of the HTML attribute. Normal values (booleans and integers) render
  the same as before.
• The crate READMEs' callback examples escape the values they insert, and both
  READMEs describe how unknown node types render.