add -v/--version cli option
add -v/--version cli option

lrascao/relx,priestjim/relx,Licenser/relx,timclassic/relx,zugolosian/relx,tsloughter/relx,erlware/relx,umatomba/relx,bitwalker/relx,RJ/relx,syl20bnr/relx,ethercrow/relx,ingwinlu/relx,bsmr-erlang/relx