Upgrade lodash

package.json

@@ -56,7 +56,7 @@
     "leaflet.control.opacity": "^1.3.0",
     "leaflet.markercluster": "^1.4.1",
     "leaflet.zoominfo": "git+https://github.com/SemanticComputing/Leaflet.zoominfo.git",
-    "lodash": "^4.17.20",
+    "lodash": "^4.17.21",
     "moment": "^2.24.0",
     "moment-range": "^4.0.2",
     "react": "^16.13.0",