Prevent CVE-2016-4658
Prevent CVE-2016-4658

URL: https://github.com/sparklemotion/nokogiri/issues/1615
Title: Nokogiri gem contains several vulnerabilities in libxml2 and libxslt
Solution: upgrade to >= 1.7.1

alphagov/content-tagger,alphagov/content-tagger,alphagov/content-tagger