upgrade loofah to fix security vulnerability
upgrade loofah to fix security vulnerability

this also upgrades nokogiri and adds crass by dependency

idb-project/the-idb,dra/the-idb,idb-project/the-idb,dra/the-idb,rbns/the-idb,idb-project/the-idb,fkr/the-idb,idb-project/the-idb,fkr/the-idb,dra/the-idb,fkr/the-idb,rbns/the-idb,rbns/the-idb,dra/the-idb,fkr/the-idb,rbns/the-idb