Fix detection of invalid dependencies in sub packages of the root package. See #334.
Fix detection of invalid dependencies in sub packages of the root package. See #334.

y12uc231/dub,rjframe/dub,Abscissa/dub-data-mod,schuetzm/dub,nazriel/dub,xentec/dub,grogancolin/dub,jelmansouri/dub,jeanbaptistelab/dub,Flamaros/dub,gedaiu/dub,Abscissa/dub,D-Programming-Language/dub,p0nce/dub,dreamsxin/dub,Geod24/dub,alexeibs/dub