OBI release 2020-04-23

[James A. Overton]

Hi everyone,

I made a new release to fix the parsing problem described here:

https://github.com/obi-ontology/obi/issues/1156

The obi_core.owl and NIAID-GSC-BRC.owl views were not affected and have not been updated.

- Versioned OWL: http://purl.obolibrary.org/obo/obi/2020-04-23/obi.owl

- Notes: https://github.com/obi-ontology/obi/releases/tag/v2020-04-23
- Branch: https://github.com/obi-ontology/obi/tree/v2020-04-23

James