Add dependabot, require node version >= 20

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    versioning-strategy: increase

.github/workflows/dependabot-auto-merge.yml

@@ -0,0 +1,22 @@
+name: Dependabot auto-merge
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v2
+        with:
+          github-token: '${{ secrets.GITHUB_TOKEN }}'
+      - name: Enable auto-merge for Dependabot PRs
+        run: gh pr merge --auto --squash "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

.github/workflows/actions.yml → .github/workflows/run-lint.yml

@@ -7,11 +7,15 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - name: Use Node.js
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
         uses: actions/setup-node@v4
         with:
           node-version: 20
+
       - name: Install dependencies
         run: npm ci
+
       - run: npm run lint

package.json

@@ -9,6 +9,9 @@
     "scripts": {
         "lint": "node scripts/lint.js"
     },
+    "engines": {
+      "node": ">=20"
+    },
     "devDependencies": {
         "drafter": "^2.0.0"
     },