Make RTL text overflow the left paragraph edge.
This behaviour is consistent with CSS Text Module Level 3.
BREAKING: Previously, all text would overflow the right paragraph edge,
regardless of text direction.
Fix handling of mixed line height.
Displace lines by the height of the tallest fragment in the previous
line, not the shortest one.
Remove paragraphLineHeight from Rich interface.
Expose rect unions in public interface.
Set release date for v1.1.0.0.
Update changelog on numbers and neutrals.
Update changelog on fragment order.
Update changelog on text with no strong direction.
Set release date for v1.0.0.1.
Describe manual testing of pagination.
Set release date for v1.0.0.0.
Handle ancestor boxes in rich layout.
Add ancestor boxes to interface.
Add required textDirection to TextOptions.
Deprecate ParagraphConstruction.
Deprecate the Plain interface.