fix nokogiri 1.6 incompatibility issue, thanks @benjaminwood
fix nokogiri 1.6 incompatibility issue, thanks @benjaminwood

merqlove/engine,timsly/engine,StartupWeekend/engine,Gnuside/contrib-locomotivecms-engine,dreimannzelt/locomotive-engine,local-ch/locomotivecms-engine,masm/engine,k-yamada/engine,LaunchPadLab/engine,emanuel/engine,boie0025/engine-clone,dreimannzelt/locomotive-engine,timsly/engine,k-yamada/engine,slavajacobson/engine,local-ch/locomotivecms-engine,scarl3tt/engine,StartupWeekend/engine,furkanayhan/engine,boie0025/engine,boie0025/engine,timsly/engine,slavajacobson/engine,emanuel/engine,boie0025/engine-clone,slavajacobson/engine,LaunchPadLab/engine,merqlove/engine,ipmobiletech/locomotivecms-engine,chepri/engine,masm/engine,Coren/engine,Coren/engine,thirus/engine,ipmobiletech/locomotivecms-engine,ipmobiletech/locomotivecms-engine,thirus/engine,thirus/engine,boie0025/engine-clone,StartupWeekend/engine,masm/engine,boie0025/engine,chepri/engine,chepri/engine,emanuel/engine,ipmobiletech/locomotivecms-engine,LaunchPadLab/engine,dreimannzelt/locomotive-engine,LaunchPadLab/engine,scarl3tt/engine,Coren/engine,dreimannzelt/locomotive-engine,furkanayhan/engine,k-yamada/engine,StartupWeekend/engine,furkanayhan/engine,scarl3tt/engine,merqlove/engine,Gnuside/contrib-locomotivecms-engine,local-ch/locomotivecms-engine,Gnuside/contrib-locomotivecms-engine,Coren/engine,chepri/engine,thirus/engine,local-ch/locomotivecms-engine,timsly/engine,boie0025/engine-clone,furkanayhan/engine,scarl3tt/engine,merqlove/engine,k-yamada/engine,boie0025/engine,masm/engine,slavajacobson/engine