add Github Actions Worflow to automerge dependabot PRs

.github/workflows/dependabotautomerge.yml

@@ -0,0 +1,53 @@
+# source: https://localheinz.com/articles/2020/06/15/merging-pull-requests-with-github-actions/
+# and: https://docs.github.com/en/actions/using-workflows/triggering-a-workflow
+name: "Merge - Dependabot PR"
+
+on:
+  pull_request:
+    branches:
+      - 'dependabot/**'
+
+  check_run:
+    types: [completed]
+
+jobs:
+  merge:
+    name: "Merge"
+
+    runs-on: "ubuntu-latest"
+
+    if: >
+      github.event.workflow_run.event == 'pull_request' &&
+      github.event.workflow_run.conclusion == 'success' &&
+      github.actor == 'dependabot[bot]'
+
+    # steps:
+    #   - name: "Approve pull request"
+    #     uses: "actions/github-script@v7"
+    #     with:
+    #       github-token: "${{ secrets.GITHUB_TOKEN }}"
+    #       script: |
+    #         const pullRequest = context.payload.workflow_run.pull_requests[0]
+    #         const repository = context.repo
+
+    #         await github.rest.pulls.createReview({
+    #           event: "APPROVE",
+    #           owner: repository.owner,
+    #           repo: repository.repo,
+    #           pull_number: pullRequest.number,
+    #         })
+
+      - name: "Merge pull request"
+        uses: "actions/github-script@v7"
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+          script: |
+            const pullRequest = context.payload.workflow_run.pull_requests[0]
+            const repository = context.repo
+
+            await github.rest.pulls.merge({
+              merge_method: "merge",
+              owner: repository.owner,
+              pull_number: pullRequest.number,
+              repo: repository.repo,
+            })