bumped loofah and rails-html-sanitizer to fix deprecation warnings (#2297)
bumped loofah and rails-html-sanitizer to fix deprecation warnings (#2297)


DMPRoadmap/roadmap,DigitalCurationCentre/roadmap,CDLUC3/dmptool,DMPRoadmap/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,CDLUC3/dmptool