The regularly updated EPSG database available as Open Knowledge Foundation OKNF Tabular DataPackage.
The CI (=Travis) should check validity and produce a ready to use SQLite - as proposed in the OSGEO MetaCRS mailing-list.
Initial version to be powered by libtiff-epsg import scripts and data dumps from epsg-registry.org. CSV format should be contain maximal amount of information from the original IOGP's http://epsg-registry.org/ GML files.