Update sample microreact.pkl to include maps & timelines

[absternator]

As per the discussion, this PR adds maps and timelines into the sample microreact.pkl file that gets loaded. This means that the map and timeline info will show in microreact. If the info_csv does not contain latitude or longitude columns, then we make maps = {}, and assuming date is split into year,month,day, if there is no year column we make timelines={}. This ensures that map and timelines are not rendered on microreact.

Below is the added json to sample microreact.pkl:

  "maps": {
    "map-1": {
      "controls": true,
      "dataType": "geographic-coordinates",
      "grouped": true,
      "groupMarkersByRegion": false,
      "lasso": false,
      "markersOpacity": 100,
      "maxNodeSize": 64,
      "minNodeSize": 4,
      "nodeSize": 5,
      "path": null,
      "regionsColourField": null,
      "regionsColourMethod": "entries",
      "regionsColourOpacity": 100,
      "regionsColourPalette": "ColorBrewer YlOrBr-2",
      "scaleMarkers": false,
      "scaleType": "logarithmic",
      "showMarkers": true,
      "showRegionOutlines": true,
      "showRegions": true,
      "style": "light",
      "tileLayerDialog": false,
      "tileLayerOpts": null,
      "tileLayerUrl": null,
      "trackViewport": false,
      "type": "mapbox",
      "title": "Map",
      "coordinateUnit": "decimal-degrees",
      "latitudeField": "latitude",
      "longitudeField": "longitude"
    }
  },
  "timelines": {
    "timeline-1": {
      "bounds": null,
      "controls": true,
      "nodeSize": 14,
      "playing": false,
      "speed": 1,
      "laneField": null,
      "style": "bar",
      "unit": null,
      "viewport": null,
      "title": "Timeline",
      "dataType": "year-month-day",
      "yearField": "year"
    }
  },

[johnlees]

All looks good to me

(The check annotation will be fixed in #322)