fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-LODASH-590103

Author: snyk-bot

package-lock.json

@@ -28,7 +28,7 @@
     "prepare": "npm run snyk-protect"
   },
   "dependencies": {
-    "lodash": "^4.17.19"
+    "lodash": "^4.17.20"
   },
   "peerDependencies": {
     "react": "^16.0.0",