update package.json

Added list of maintainers

Author: iyerrama29

package.json

@@ -28,7 +28,16 @@
   "homepage": "https://www.contentstack.com/docs/tools-and-frameworks/web-framework-contentstack-express/installation#install-cli",
   "license": "MIT",
   "main": "index.js",
-  "maintainers": [],
+  "maintainers": [
+    {
+      "name": "hiteshbal",
+      "email": "hitesh.baldaniya@raweng.com"
+    },
+    {
+      "name": "mynk",
+      "email": "mayank@raweng.com"
+    }
+  ],
   "name": "contentstack-cli",
   "readme": "./README.md",
   "version": "3.1.0",