Close Lua state on exit
Close Lua state on exit

Calls `os.exit` with `close=true` to allow Lua to close the Lua state
before exiting.

leafo/busted,DorianGray/busted,ryanplusplus/busted,o-lim/busted,nehz/busted,Olivine-Labs/busted,xyliuke/busted,sobrinho/busted,mpeterv/busted,istr/busted