Test ultra narrow Arabic text.
Test unions of lists of rectangles.
Expose rect unions in public interface.
Implement unions of lists of rectangles.
Parametrise rectangle union bias.
Remove TODO which would require an API break.
Test shaping across intra-word breaks.
Set release date for v1.1.0.0.
Simplify code since run direction is always known.
Add TODO for end-of-line whitespace.
Update changelog on numbers and neutrals.
Improve BiDi handling of numbers and neutrals.
Autodetect text direction for legacy interface.
Test with only directionally neutral characters.
Test mirrored neutral characters.
Add shaped runs output for bidirectional text.
Add tests for mixed text direction.
Update changelog on fragment order.