Update rails-html-sanitizer
Update rails-html-sanitizer

The Rails sanitizer gem monkey-patched the Loofah scrubbers so needed
to be updated to address the previous vulnerability.

unboxed/e-petitions,StatesOfJersey/e-petitions,unboxed/e-petitions,alphagov/e-petitions,StatesOfJersey/e-petitions,oskarpearson/e-petitions,oskarpearson/e-petitions,StatesOfJersey/e-petitions,joelanman/e-petitions,unboxed/e-petitions,joelanman/e-petitions,oskarpearson/e-petitions,unboxed/e-petitions,StatesOfJersey/e-petitions,alphagov/e-petitions,joelanman/e-petitions,alphagov/e-petitions,alphagov/e-petitions