Save all data from the package description when serializing. This fixes build problems which became apparent after the switch to the new "dub.json" as primary project description file.
Save all data from the package description when serializing. This fixes build problems which became apparent after the switch to the new "dub.json" as primary project description file.

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