Added six to requirements.txt
Added six to requirements.txt

rochacbruno/flasgger,flasgger/flasgger,flasgger/flasgger,talitarossari/flasgger,flasgger/flasgger,talitarossari/flasgger,rochacbruno/flasgger,rochacbruno/flasgger,flasgger/flasgger,talitarossari/flasgger