add dependabot automerge

Signed-off-by: André Bauer <[email protected]>

.github/dependabot.yml

@@ -6,3 +6,12 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+      time: "09:00"
+      timezone: "Europe/Berlin"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      time: "09:00"
+      timezone: "Europe/Berlin"

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

@@ -0,0 +1,23 @@
+---
+name: Dependabot auto-merge
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.user.login == 'dependabot[bot]'
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+      - name: Enable auto-merge for Dependabot PRs
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}