[Rust] Release 0.22.0

Changed

• Extend email validation. #471
• BREAKING: Custom retrievers now receive &Uri<&str> instead of &UriRef<&str>
• Bump once_cell to 1.20.
• Bump regex to 1.11.

Fixed

• time format validation (leap seconds and second fractions).
• duration format validation.
• Panic on root $id without base. #547
• hostname format validation (double dot).
• idn-hostname format validation. #101

Performance

• Faster building of a validator.
• hostname, date, time, date-time, and duration formats validation.
• Cache regular expressions for pattern. #417