fix: packages/contentstack-branches/package.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

packages/contentstack-branches/package.json

@@ -11,7 +11,7 @@
     "@contentstack/cli-utilities": "~1.18.0",
     "chalk": "^4.1.2",
     "just-diff": "^6.0.2",
-    "lodash": "^4.17.23"
+    "lodash": "^4.18.1"
   },
   "devDependencies": {
     "@contentstack/cli-dev-dependencies": "^1.3.1",