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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-LODASH-1018905
- https://snyk.io/vuln/SNYK-JS-LODASH-1040724

Author: snyk-bot

package-lock.json

@@ -41,7 +41,7 @@
     "fastify-healthcheck": "^1.0.0",
     "fastify-swagger": "^1.2.0",
     "http": "0.0.0",
-    "lodash": "^4.17.20",
+    "lodash": "^4.17.21",
     "mongoose": "^5.7.5",
     "snyk": "^1.425.4",
     "uuid": "^3.3.2",