4.16.0

Added

• Add Latvian language localization (#301) @EPoikans
• Add i18n support for naturalsize() and French translation (#294) @Yibomao

Changed

• Performance improvements: 1.07x - 8.4x (#315) @hugovk
• Lazy imports for Python 3.15+ (#335) @hugovk
• Drop experimental Python 3.13 free-threaded (#336) @hugovk
• Refactor: simplify scientific() and extract _SUPERSCRIPT_MAP constant (#313) @maayanmatsliah-tech

Fixed

• Fix naturalsize() rounding rollover at unit boundaries (#329) @patchwright
• Carry metric() to the next SI prefix when rounding reaches 1000 (#328) @gaoflow
• Stop printing two minus signs in fractional for a negative mixed number (#320) @c-tonneslan
• Return an empty string from natural_list() for an empty list (#318) @c-tonneslan
• Handle tz-aware datetimes in naturalday() and naturaldate() (#297) @bysiber
• Fix Arabic translation (#307) @AYMENJD
• Fix Spanish large number translations to use long scale (#302) @sedat4ras