v3.1.0

Changes:

• Add separation flag for tree layout. (vega/vega#1399)

v3.0.3

Changes:

• Update Nest and Stratify to handle empty data.
• Add tests.

v3.0.2

Changes:

• Fix hierarchy transforms' as param schema. (vega/vega#1342)

v3.0.1

Changes:

• Update dependencies.

v3.0.0

Changes:

• Refactor nest, stratify, and treelinks data object generation.
• Remove nest transform key parameter, which is no longer needed.
• Remove treelinks transform key parameter, which is no longer needed.
• Add nest test cases from @nyurik (#2).
• Update dependencies, use vega-dataflow 4.0.0.

v2.1.2

Changes:

• Fix pulse handling and metadata for Nest transform.
• Fix pulse handling and metadata for Stratify transform.

v2.1.1

Changes:

• Internal updates to Nest transform metadata and pulse source materialization.

v2.1.0

Changes:

• Add generation of data objects for non-leaf nodes to Nest transform. Enable using the generate transform parameter.

v2.0.0

Changes:

• Update to use new build / module system.
• Break up tree layouts into separate source code files.

v1.0.0

Initial release!