fix(deps): bump @contentstack/core to ^1.5.3, release 5.6.1

Resolve security vulnerabilities in dependencies: @contentstack/core 1.5.3
moves qs to 6.16.0, and the follow-redirects override is raised to ^1.16.1.
TypeScript updated to ~5.9.3 for the build toolchain.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Author: cs-raj

CHANGELOG.md

@@ -1,3 +1,8 @@
+### Version: 5.6.1
+#### Date: Oct-06-2026
+Fix: Resolve security vulnerabilities in dependencies — bump `@contentstack/core` to `^1.5.3` and the `follow-redirects` override to `^1.16.1`.
+Chore: Update TypeScript to `~5.9.3`.
+
 ### Version: 5.6.0
 #### Date: Aug-10-2026
 Fix: Transient network-layer errors (ENOTFOUND, ENETUNREACH, ECONNRESET, ECONNREFUSED, EAI_AGAIN, ETIMEDOUT, EHOSTUNREACH, ENETDOWN) are now retried automatically using the SDK's configured retry policy instead of failing immediately.

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@contentstack/delivery-sdk",
-  "version": "5.6.0",
+  "version": "5.6.1",
   "type": "module",
   "license": "MIT",
   "engines": {
@@ -47,7 +47,7 @@
     "prerelease": "npm run test:all && npm run validate:all"
   },
   "dependencies": {
-    "@contentstack/core": "^1.5.2",
+    "@contentstack/core": "^1.5.3",
     "@contentstack/utils": "^1.9.1",
     "axios": "^1.20.0",
     "humps": "^2.0.1"
@@ -58,7 +58,7 @@
     "README.md"
   ],
   "overrides": {
-    "follow-redirects": "^1.16.0"
+    "follow-redirects": "^1.16.1"
   },
   "devDependencies": {
     "@playwright/test": "^1.63.0",
@@ -82,7 +82,7 @@
     "jest-html-reporters": "^3.1.7",
     "jest-junit": "^16.0.0",
     "ts-jest": "^29.4.6",
-    "typescript": "~5.7.3",
+    "typescript": "~5.9.3",
     "ts-node": "^10.9.2"
   },
   "homepage": "https://github.com/contentstack/contentstack-typescript",