[Ruby] Release 0.22.0

Changed

• Update cssparser to 0.38.
• Update html5ever to 0.40.
• Update selectors to 0.41.
• Update magnus to 0.9.

Fixed

• remove_inlined_selectors removed @-rules from the <style> blocks it rewrites (it should remove only inlined selectors).

Security

• class attribute values not HTML-escaped in the output, allowing markup injection via " in a class value. GHSA-jh54-c7gc-mvcc