chore: fix long dependency

Author: GautamSharda

handwritten/pubsub/package.json

@@ -66,6 +66,7 @@
     "heap-js": "^2.6.0",
     "is-stream-ended": "^0.1.4",
     "lodash.snakecase": "^4.1.1",
+    "long": "^5.3.1",
     "p-defer": "^3.0.0"
   },
   "devDependencies": {