use typescript 3.3.3 > firebase/firebase-functions#404

Author: cloudliner

functions/package-lock.json

@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "tslint": "~5.8.0",
-    "typescript": "~2.8.3"
+    "typescript": "^3.3.3"
   },
   "private": true
 }