v0.8.0

A minor bump rather than a patch: the library API changed. See Breaking
below — embedders need ..Options::default() in a Options literal, and
opf::check now takes &Options. The CLI and the WASM bindings are
source-compatible; nothing an existing invocation or JS call does changes
meaning.

Added

• -v / --epub-version <2|2.0|3|3.0>: validate against a version the book
  doesn't declare (#61), the same flag epubcheck spells -v. On a
  disagreement PKG-001 reports it and the requested version wins — as
  epubcheck does, so a ported invocation means the same thing here. Expect a
  long report when the two disagree: a 3.0 book checked as 2.0 breaks a great
  many EPUB 2 rules, all of them really one finding. Exposed to embedders as
  Options::epub_version and as validate()'s fourth argument in the WASM
  bindings.
• Coverage is now 190 of 197 live epubcheck checks (~96%).

Breaking

• Options gained a field, so a struct literal that lists every field no
  longer compiles — add ..Options::default() (which is now what this crate's
  own helpers do).
• opf::check takes &Options in place of its separate profile and
  advisory parameters. This is the second time that signature had to change
  for a new option, and each change breaks embedders over something they don't
  care about; passing the struct means the next option costs them nothing.

Fixed

• PKG-023 now keys on the version being validated against, not the one the
  package document declares — so forcing an EPUB 3 book to EPUB 2 with -v
  correctly reports that its profile does not apply. (It landed in 0.7.14
  keyed on the declared version, which was right until -v existed.)

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