message: Google killed Pixel Slate (graveyard.json update)
  I didn't use the link to wikipedia because the page it's not yet updated
diff: [
  + {
  + "dateClose": "2019-06-20",
  + "dateOpen": "2018-10-09",
  + "description": "Pixel Slate was a tablet running Chrome OS.",
  + "link": "https://9to5google.com/2019/06/20/google-tablet-abandoned-development/",
  + "name": "Pixel Slate",
  + "type": "hardware"
  + },
  {
  "dateClose": "2017-09-20",
  "dateOpen": "2010-06-15",
  