Turbopack build: Fix benchmark running with webpack (vercel#70533)

Ensures there is no error running Tailwind with webpack in this
benchmark.

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bench/heavy-npm-deps/package.json

@@ -17,7 +17,7 @@
     "lodash-es": "^4.17.21",
     "lucide-react": "^0.383.0",
     "mermaid": "^10.9.1",
-    "next": "workspace:*"
-  },
-  "devDependencies": {}
+    "next": "workspace:*",
+    "tailwindcss": "3.2.7"
+  }
 }

bench/heavy-npm-deps/postcss.config.mjs → bench/heavy-npm-deps/postcss.config.cjs

@@ -5,4 +5,4 @@ const config = {
   },
 }
 
-export default config
+module.exports = config

bench/heavy-npm-deps/tailwind.config.ts → bench/heavy-npm-deps/tailwind.config.js

@@ -1,6 +1,4 @@
-import type { Config } from 'tailwindcss'
-
-const config: Config = {
+const config = {
   content: [
     './pages/**/*.{js,ts,jsx,tsx,mdx}',
     './components/**/*.{js,ts,jsx,tsx,mdx}',
@@ -16,4 +14,4 @@ const config: Config = {
   },
   plugins: [],
 }
-export default config
+module.exports = config

scripts/devlow-bench.mjs

@@ -164,7 +164,7 @@ const nextBuildWorkflow =
           '.next',
           'cache',
           'webpack',
-          'client-development'
+          'client-production'
         )
         await Promise.race([
           waitForFile(join(cacheLocation, 'index.pack')),