Update published_on when published
Update published_on when published

jorol/StoryMapJS,miguelpaz/StoryMapJS,wangjun/StoryMapJS,jorol/StoryMapJS,BenHeubl/StoryMapJS,makinacorpus/StoryMapJS,miguelpaz/StoryMapJS,BenHeubl/StoryMapJS,makinacorpus/StoryMapJS,makinacorpus/StoryMapJS,1modm/StoryMapJS,BenHeubl/StoryMapJS,BenHeubl/StoryMapJS,wangjun/StoryMapJS,cr3ative/StoryMapJS,cr3ative/StoryMapJS,wangjun/StoryMapJS,1modm/StoryMapJS,cr3ative/StoryMapJS,cr3ative/StoryMapJS,1modm/StoryMapJS,jorol/StoryMapJS,miguelpaz/StoryMapJS,wangjun/StoryMapJS,jorol/StoryMapJS,1modm/StoryMapJS