Switch PRs from dependabot to automerge if tests pass

- PRs are not merged automatically, becaus PRs have to be reviewed by a human

Signed-off-by: Robert Waffen <[email protected]>

.github/workflows/ci.yaml

@@ -74,3 +74,22 @@ jobs:
     name: Test suite
     steps:
       - run: echo Test suite completed
+
+  dependabot:
+    name: 'Dependabot auto-merge'
+    needs:
+      - tests
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' && github.event_name == 'pull_request'}}
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/[email protected]
+        with:
+          github-token: '${{ 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}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}