Fix #221 - Run validator on CI (#253)
Fix #221 - Run validator on CI (#253)

Co-authored-by: Fabrice V <0d2f7097c5a8692407fc370ecb48910e4b1e4794@mobilitydata.org>
MobilityData/gtfs-validator,MobilityData/gtfs-validator,MobilityData/gtfs-validator,MobilityData/gtfs-validator