v0.5.0

Add

• Weekday for getting weekday of a date and weeks of given durations based on
  various initial days
• more tm and jtm methods to convert between C and Rust more easily:
  • Date::from_jtm_yday and Date::from_jtm_mday
  • MonthDay::from_jtm and MonthDay::to_jtm_mday
  • Month::from_jtm_mon and Month::to_jtm_mon
  • Ordinal::from_tm_yday and Ordinal::to_tm_yday
  • Year::from_jtm_year and Year::to_jtm_year
• support for core::ffi int types in codegen::resolve_type and cffi
• IYmd (as a replacement for the removed IntYmd).
• rlib type
• support From<SystemTime> on std feature
• support jiff feature

Remove

• Date::update_jtm not to have mut references or pointer to FFI if not
  necessary
• deprecated MonthDay::LEAP_LAST_MONTH_DAY_MAX.
• deprecated MonthDay::NON_LEAP_LAST_MONTH_DAY_MAX.
• IntYmd (replaced with IYmd).

Fix

• Ordering not define (not publicly) in C headers
• cffi not being able to determine const of pointers correctly in functions
  (patterns in general).
• test --all-features being broken since v0.4.1 (4395e9d, "Add tm
  support for C")
• wasm-opt complaining about --enable-bulk-memory missing for some setups
• Date::add_days_strict not taking IDayDiff::MAX (previous actual maximum
  was around IDayDiff::MAX - self.ordinal)
• add_*_strict methods on Date and MonthDay having wrong did_saturate
• Date::add_months* method not working with negative values

Full Changelog: v0.4.2...v0.5.0