v0.4.0

Other

• rustfmt the ECMA-402 number/datetime code + codegen emit_dates
• ECMA-402 DateTimeFormat options + formatToParts
• ECMA-402 NumberFormat options + formatToParts
• add sub-second DateTime.millisecond field
• raw-source Gregorian date data from official CLDR v48
• linear-time connector folding (quadratic)
• truncate normalization buffer on char boundary (wrong-fallback)
• validate POSIX TZ rule field ranges (reject malformed M-rules)
• document that to_unicode output is unvalidated (not for security decisions)
• bounds-check names.bin parser (panic on malformed blob)
• bound push_pend against MAX_DECOMP (latent OOB)
• wrapping_add for regional-indicator parity counters (debug overflow)
• guard forward conversions against i64 overflow (panic on extreme inputs)
• bound find/contains unaligned-start scan (quadratic DoS)