v0.8.3

Fixed

• Six XHTML 1.1 attributes are no longer rejected in EPUB 2 documents:
  style@media, meta@scheme, base@target, head@profile,
  html@version and q@cite. <style type="text/css" media="screen"> is
  ordinary markup; the rest are rarer but equally valid.

  Found by diffing our EPUB 2 attribute lists against epubcheck's own
  XHTML 1.1 modules, rather than by waiting for someone to report them —
  which is how the two attributes in 0.8.2 arrived. The same audit found a
  larger gap in the other direction (attributes we accept and XHTML 1.1 does
  not); that one is deliberately not in this release, because it is a
  tightening whose effect on real books has to be measured first.

Internal

• CI now gates on cargo clippy -D warnings, and the 41 findings that stood
  in the way are cleared. Twenty of them were doc-comment list continuations
  that rustdoc was rendering outside their list item, so that lint was
  reporting a real documentation defect. No behaviour change.

Full notes: CHANGELOG.md. Also on crates.io.