change typescript version

Author: Rafael Fernandez Serra

example/package.json

@@ -31,7 +31,7 @@
     "angular": "1.8.3",
     "rxjs": "^7.4.0",
     "tslib": "1.13.0",
-    "typescript": "4.9.5",
+    "typescript": "4.8.4",
     "zone.js": "0.11.4"
   },
   "devDependencies": {