Added ESD9B family of ESD TVS diodes.
Datasheet: https://www.onsemi.com/pub/Collateral/ESD9B-D.PDF Footprint depends on: https://github.com/KiCad/kicad-footprints/pull/1999
Datasheet: https://www.onsemi.com/pub/Collateral/ESD9B-D.PDF Footprint depends on: https://github.com/KiCad/kicad-footprints/pull/1999