Allow explicit control of box collapsing.

Update changelog on paragraph alignment options.

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.

Bump version to 1.2.0.0.

Expose rect unions in public interface.

Bump version to 1.1.1.0.

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.

Bump version to 1.1.0.0.

Set release date for v1.0.0.1.

Describe manual testing of pagination.

Bump version to 1.0.0.1.

Set release date for v1.0.0.0.

Handle ancestor boxes in rich layout.

Add ancestor boxes to interface.

Add required textDirection to TextOptions.