feat: upgrade tslib from 1.14.1 to 2.6.2

Snyk has created this PR to upgrade tslib from 1.14.1 to 2.6.2.

See this package in npm:
https://www.npmjs.com/package/tslib

See this project in Snyk:
https://app.snyk.io/org/contentstack-cli/project/bfbe8b26-89e5-4fbf-93c3-29ae87f853ad?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -20,7 +20,7 @@
     "node-graphviz": "^0.1.1",
     "table": "^6.8.1",
     "tmp": "^0.2.1",
-    "tslib": "^1.13.0",
+    "tslib": "^2.6.2",
     "url-join": "^4.0.1"
   },
   "devDependencies": {