refactor: prevent bundling entire package.json in built code (#6753)

.changeset/eight-emus-compete.md

@@ -0,0 +1,5 @@
+---
+"wrangler": patch
+---
+
+refactor: prevent bundling entire `package.json` in built code

packages/wrangler/src/update-check.ts

@@ -1,7 +1,10 @@
 import chalk from "chalk";
 import supportsColor from "supports-color";
 import checkForUpdate from "update-check";
-import pkg, { version as wranglerVersion } from "../package.json";
+import {
+	name as wranglerName,
+	version as wranglerVersion,
+} from "../package.json";
 import { logger } from "./logger";
 import type { Result } from "update-check";
 
@@ -42,6 +45,9 @@ After installation, run Wrangler with \`npx wrangler\`.`
 
 async function doUpdateCheck(): Promise<string | undefined> {
 	let update: Result | null = null;
+	// `check-update` only requires the name and version to check. This way we
+	// don't have to bundle the entire `package.json` in the final build.
+	const pkg = { name: wranglerName, version: wranglerVersion };
 	try {
 		// default cache for update check is 1 day
 		update = await checkForUpdate(pkg, {