Test on Node 24 and build releases on it

.github/workflows/ci.yml

@@ -13,7 +13,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18, 20, 22]
+        # 18 is the engines floor; keep it tested while package.json promises it.
+        node-version: [18, 20, 22, 24]
     steps:
       - uses: actions/checkout@v7
       - name: Use Node.js ${{ matrix.node-version }}

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
 
       - uses: actions/setup-node@v7
         with:
-          node-version: 20
+          node-version: 24 # current LTS; Node 20 is end-of-life
           registry-url: https://registry.npmjs.org
           cache: npm
           cache-dependency-path: package.json