Upgrade to Node 24 with shared test workflow (#21)

* Upgrade to Node 24 with shared test workflow

Migrate test.yml to use shared reusable workflow from
activeprospect/github-action-workflows. Add .nvmrc and engines field.

* trigger CI after shared workflow fix

Made-with: Cursor

Author: johnrb2

.github/workflows/test.yml

@@ -5,19 +5,19 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x, 18.x, latest]
+        node-version: [20.x, 24.x]
     env:
       NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
- 
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
       with:
         node-version: ${{ matrix.node-version }}
     - run: npm install
     - name: Run tests
-      run: npx nyc@latest --reporter=lcov npm test
-    - uses: codecov/codecov-action@v1
+      run: npx nyc@17.1.0 --reporter=lcov npm test
+    - uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5.4.3
       with:
         token: ${{ secrets.CODECOV_TOKEN }}

.nvmrc

@@ -0,0 +1 @@
+24

package.json

@@ -30,5 +30,8 @@
   "bugs": {
     "url": "https://github.com/hughsk/flat/issues"
   },
-  "homepage": "https://github.com/hughsk/flat"
+  "homepage": "https://github.com/hughsk/flat",
+  "engines": {
+    "node": ">=20"
+  }
 }