Upgrade webpack-dev-server, install leaflet.zoominfo

package.json

@@ -44,7 +44,7 @@
     "style-loader": "^0.20.3",
     "webpack": "^4.41.2",
     "webpack-cli": "^3.1.2",
-    "webpack-dev-server": "^3.1.14",
+    "webpack-dev-server": "^3.10.3",
     "webpack-merge": "^4.1.4"
   },
   "dependencies": {
@@ -67,6 +67,7 @@
     "leaflet-draw": "^1.0.4",
     "leaflet-fullscreen": "^1.0.2",
     "leaflet.markercluster": "^1.4.1",
+    "leaflet.zoominfo": "git+https://github.com/SemanticComputing/Leaflet.zoominfo.git",
     "lodash": "^4.17.15",
     "material-table": "^1.39.0",
     "moment": "^2.24.0",