update crossref with days back setting
update crossref with days back setting

icereval/scrapi,felliott/scrapi,erinspace/scrapi,mehanig/scrapi,erinspace/scrapi,CenterForOpenScience/scrapi,ostwald/scrapi,CenterForOpenScience/scrapi,alexgarciac/scrapi,fabianvf/scrapi,jeffreyliu3230/scrapi,mehanig/scrapi,fabianvf/scrapi,felliott/scrapi