fix: package.json & package-lock.json to reduce vulnerabilities (#6864)

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

Co-authored-by: Diamond Lewis <findlewis@gmail.com>

package.json

@@ -42,7 +42,7 @@
     "jsonwebtoken": "8.5.1",
     "jwks-rsa": "1.8.1",
     "ldapjs": "2.0.0",
-    "lodash": "4.17.19",
+    "lodash": "4.17.20",
     "lru-cache": "5.1.1",
     "mime": "2.4.6",
     "mongodb": "3.5.9",