## Version 1.7.1

- add `ontology_reactome()`
- add `rankdir` argument to `dag_as_DOT()`.
- add `dag_is_offspring()`/`dag_is_ancestor()`.

----------------

## Version 1.3.1

- `cpp_check_cyclic_node()`: a term is marked as "checked" if it is tranversed.
- `import_obo()`: ignore is_a that has gci_filter.
- add `CA_terms()`.

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## Version 1.1.12

- add `alternative_terms` argument in `create_ontology_DAG()`

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## Version 1.1.5

- add `singleton_ontology()`.

-----------------

## Version 1.1.3

- add `dag_shiny()`
- add `dag_annotated_with_genes_*()`

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## Version 1.1.1

- add functions to generate random DAGs
- add dag_reorder()

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## Version 0.99.6

- optimized Shen and SSDD methods

------------------

## Version 0.99.4

- Revised according to https://github.com/Bioconductor/Contributions/issues/3108

------------------

## Version 0.99.0

- First release.
