Update lua code in luvi to use new luv string constants
Update lua code in luvi to use new luv string constants

joerg-krause/luvi,brimworks/luvi,zhaozg/luvi,virgo-agent-toolkit/luvi,kidaa/luvi,luvit/luvi,joerg-krause/luvi,luvit/luvi,brimworks/luvi,virgo-agent-toolkit/luvi,zhaozg/luvi