message: handle safari cocoa core data timestamps
diff: @@ -86,8 +86,13 @@ export const genericPositionFromGeolocation = (geoPosition: GeolocationPosition)
  const {
  latitude, longitude, altitude, accuracy,
  } = geoPosition.coords;
  +
  return {
  - timestamp: geoPosition.timestamp,
  + // safari reports geolocation timestamps as Apple Cocoa Core Data timestamp
  + // or ms since 1/1/2001 instead of the regular epoch
  + // they also use local time, not utc
  + // to simplify, just use Date.now()
  + timestamp: Date.now(),
  latitude, longitude, altitude, accuracy,
  };
  };
  