If `dependencies` is not set, default to empty object
If `dependencies` is not set, default to empty object

Fixes crash when package only has `devDependencies` field.

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