Add warning when args are supplied, and empty completion
Add warning when args are supplied, and empty completion

segment-boneyard/npm,cchamberlain/npm,rsp/npm,segrey/npm,kimshinelove/naver-npm,segmentio/npm,xalopp/npm,rsp/npm,midniteio/npm,Volune/npm,segmentio/npm,thomblake/npm,kriskowal/npm,Volune/npm,thomblake/npm,cchamberlain/npm-msys2,DIREKTSPEED-LTD/npm,DIREKTSPEED-LTD/npm,evanlucas/npm,rsp/npm,DaveEmmerson/npm,kimshinelove/naver-npm,kimshinelove/naver-npm,evocateur/npm,evanlucas/npm,princeofdarkness76/npm,DaveEmmerson/npm,ekmartin/npm,cchamberlain/npm-msys2,ekmartin/npm,chadnickbok/npm,yyx990803/npm,misterbyrne/npm,midniteio/npm,TimeToogo/npm,evocateur/npm,yyx990803/npm,lxe/npm,lxe/npm,yodeyer/npm,Volune/npm,ekmartin/npm,kemitchell/npm,princeofdarkness76/npm,xalopp/npm,haggholm/npm,thomblake/npm,DIREKTSPEED-LTD/npm,segrey/npm,segrey/npm,haggholm/npm,chadnickbok/npm,TimeToogo/npm,yibn2008/npm,midniteio/npm,lxe/npm,yodeyer/npm,misterbyrne/npm,evanlucas/npm,evocateur/npm,kriskowal/npm,cchamberlain/npm-msys2,DaveEmmerson/npm,haggholm/npm,yibn2008/npm,yodeyer/npm,kemitchell/npm,segment-boneyard/npm,TimeToogo/npm,kemitchell/npm,misterbyrne/npm,chadnickbok/npm,kriskowal/npm,yyx990803/npm,segment-boneyard/npm,cchamberlain/npm,xalopp/npm,segmentio/npm,yibn2008/npm,princeofdarkness76/npm,cchamberlain/npm