chore: install long as a devdep

Author: sofisl

handwritten/firestore/package.json

@@ -107,6 +107,7 @@
     "jsdoc-region-tag": "^3.0.0",
     "length-prefixed-json-stream": "^1.0.1",
     "linkinator": "^6.1.4",
+    "long": "^5.3.2",
     "mkdirp": "^3.0.1",
     "mocha": "^11.7.1",
     "nise": "^6.1.1",