Merge pull request #470 from ruby/automerge

Try to use dependabot automerge

.github/workflows/dependabot_automerge.yml

@@ -0,0 +1,41 @@
+# from https://github.com/gofiber/swagger/blob/main/.github/workflows/dependabot_automerge.yml
+name: Dependabot auto-merge
+on:
+  pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  wait_for_checks:
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
+    steps:
+       - name: Wait for check is finished
+         uses: lewagon/wait-on-check-action@v1.2.0
+         id: wait_for_checks
+         with:
+             ref: ${{ github.event.pull_request.head.sha || github.sha }}
+             running-workflow-name: wait_for_checks
+             check-regexp: test
+             repo-token: ${{ secrets.MATZBOT_GITHUB_TOKEN }}
+             wait-interval: 10
+  dependabot:
+    needs: [wait_for_checks]
+    name: Dependabot auto-merge
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.3.6
+        with:
+          github-token: "${{ secrets.MATZBOT_GITHUB_TOKEN }}"
+      - name: Enable auto-merge for Dependabot PRs
+        if: ${{steps.metadata.outputs.update-type == 'version-update:semver-minor' || steps.metadata.outputs.update-type == 'version-update:semver-patch'}}
+        run: |
+            gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.MATZBOT_GITHUB_TOKEN}}