chore: upgrade pnpm to 9 (opennextjs#595)

* update pnpm to 9 in engines

* update pnpm in gh actions

* lockfile

* remove workspaces from package.json

Author: sommeeeer

.github/actions/pnpm-setup/action.yml

@@ -13,7 +13,7 @@ runs:
     # Install pnpm. https://github.com/pnpm/action-setup
     - uses: pnpm/action-setup@v4
       with:
-        version: 8
+        version: 9
         # run_install: false
 
     # Get pnpm store path so we can cache it

.github/workflows/e2e.yml

@@ -88,7 +88,7 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 8
+          version: 9
 
       - name: Set up NodeJS v18
         uses: actions/setup-node@v4

package.json

@@ -4,9 +4,6 @@
   "license": "MIT",
   "private": true,
   "type": "module",
-  "workspaces": [
-    "packages/*"
-  ],
   "scripts": {
     "dev": "turbo run dev",
     "build": "turbo run build",
@@ -29,6 +26,6 @@
   },
   "engines": {
     "node": ">=18",
-    "pnpm": ">=8 <9"
+    "pnpm": ">=9"
   }
 }