Add the key enumeration
Add the key enumeration

arnognulf/linenoise,zaxbbun/linenoise,AresTao/linenoise,John-Colvin/linenoise,antirez/linenoise,rlonstein/linenoise,tadzik/linenoise,saisai/linenoise,howerj/libline,digsrc/linenoise,hoelzro/linenoise,MoarVM/linenoise,clibs/linenoise,dragontux/linenoise