[Rust] Release 0.19.0

Added

• InlineOptions::remove_inlined_selectors option to remove selectors that were successfully inlined from <style> blocks.

Changed

• Update cssparser to 0.36.
• Update html5ever to 0.36.
• Update selectors to 0.33.

Fixed

• CLI tests compatibility with future Cargo versions. #602

Performance

• Use element indexes for faster selector lookups on large documents.
• Use more efficient data structures for storing element styles.