chore: upgrade pnpm to v12 and migrate CI to pnpm/setup

.github/workflows/build-test.yml

@@ -15,7 +15,8 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest"]
-        node_version: [lts/-1, lts/*, latest]
+        # 22 tracks the previous Node.js LTS line; pnpm/setup has no "previous LTS" alias, so bump this manually when Node.js LTS rotates
+        node_version: [22, lts, latest]
       fail-fast: false
 
     runs-on: ${{ matrix.os }}
@@ -24,14 +25,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v7
 
-      - name: Setup pnpm
-        uses: pnpm/action-setup@ea17c68df8912ef543352723c149a84f56e3d413
-
-      - name: Setup NodeJS
-        uses: actions/setup-node@v7
+      - name: Setup pnpm & Node.js
+        uses: pnpm/setup@fbda4c85fc2e1e08721cd8763afea8f48d60f024 # v3.0.0
         with:
-          node-version: ${{ matrix.node_version }}
-          cache: pnpm
+          runtime: node@${{ matrix.node_version }}
+          cache: true
+          install: false
 
       - name: Install dependencies
         run: pnpm i --frozen-lockfile

.github/workflows/release.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - name: Run release-please command
         id: release
-        uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7
+        uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0
 
   build-and-publish:
     name: Build & Publish
@@ -49,13 +49,14 @@ jobs:
         uses: actions/checkout@v7
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@ea17c68df8912ef543352723c149a84f56e3d413
+        uses: pnpm/setup@fbda4c85fc2e1e08721cd8763afea8f48d60f024 # v3.0.0
+        with:
+          install: false
 
       - name: Setup NodeJS
         uses: actions/setup-node@v7
         with:
           node-version: latest
-          cache: pnpm
           registry-url: "https://registry.npmjs.org"
 
       - name: Install dependencies

package.json

@@ -11,6 +11,6 @@
   "homepage": "https://github.com/forwardsoftware/gulp-plugins#readme",
   "bugs": "https://github.com/forwardsoftware/gulp-plugins/issues",
   "repository": "github:forwardsoftware/gulp-plugins",
-  "packageManager": "pnpm@11.8.0+sha512.c1f5e7c4cb241c8f174b743851d82f42b802324afc8b0f116b96adb15aa06664948dde36960a3ba1079ba5b4b29dd0140135b94b5b5f5263592249d68e555f26",
+  "packageManager": "pnpm@12.8.0",
   "scripts": {}
 }