Use Array#lastIndexOf inside Parser#_processCloseTag
Use Array#lastIndexOf inside Parser#_processCloseTag

Might be a performance plus in future versions of node (currently it
doesn't have much impact, it's just more readable)

jasonsanjose/htmlparser2,jasonsanjose/htmlparser2,mail-apps/htmlparser2,kirbysayshi/node-htmlparser,broadly/htmlparser2,broadly/htmlparser2,magicode/htmlparser2,frontapp/htmlparser2,magicode/htmlparser2,frontapp/htmlparser2,fasterize/node-htmlparser,mail-apps/htmlparser2