Update dependency tslib to v2

Author: renovate[bot]

package.json

@@ -27,7 +27,7 @@
   "dependencies": {
     "@types/node": "13.11.1",
     "ts-node": "8.8.2",
-    "tslib": "1.11.1",
+    "tslib": "2.6.3",
     "typescript": "3.8.3"
   },
   "devDependencies": {