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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-LODASH-15869625
- https://snyk.io/vuln/SNYK-JS-LODASH-15869619

Author: snyk-bot

package-lock.json

@@ -33,7 +33,7 @@
   "dependencies": {
     "@stoplight/spectral-core": "^1.21.0",
     "@stoplight/spectral-documentation": "^1.3.1",
-    "lodash": "^4.17.23"
+    "lodash": "^4.18.1"
   },
   "devDependencies": {
     "@commitlint/cli": "^20.5.0",