v0.9.0

New

• Month::all
• Month::into_iter (repeating month iterator)
• Enable de/serialization for Month (with serde crate feature)
• impl FromStr for Month
• impl TryFrom<&[u8]> for Month
• Weekday::all
• Weekday::into_iter (repeating week iterator)
• Enable de/serialization for Weekday (with serde crate feature)
• impl FromStr for Weekday
• impl TryFrom<&[u8]> for Weekday

Breaking

• Bump MSRV to 1.80

Changed

• Utc2k::unixtime is now const
• Utc2k::abs_diff is now const