Create auto-merge

.github/workflows/auto-merge

@@ -0,0 +1,50 @@
+name: Dependabot auto-merge
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, labeled]
+  check_suite:
+    types: [completed]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  auto-merge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/[email protected]
+        with:
+          github-token: '${{ secrets.GITHUB_TOKEN }}'
+
+      - name: Check if CI passed
+        id: ci-check
+        run: |
+          result=$(curl -H "Accept: application/vnd.github.v3+json" \
+            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+            https://api.github.com/repos/${{ github.repository }}/commits/${{ github.event.pull_request.head.sha }}/status)
+          if [[ $(echo $result | jq -r '.state') != "success" ]]; then
+            echo "::set-output name=status::failure"
+            exit 1
+          fi
+          echo "::set-output name=status::success"
+
+      - name: Auto-approve
+        if: steps.metadata.outputs.update-type == 'version-update:semver-minor' && steps.ci-check.outputs.status == 'success'
+        run: |
+          gh pr review --approve --body "CI passed, auto-approving." ${{ github.event.pull_request.html_url }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Auto-merge
+        if: steps.metadata.outputs.update-type == 'version-update:semver-minor' && steps.ci-check.outputs.status == 'success'
+        run: |
+          gh pr merge --auto --merge ${{ github.event.pull_request.html_url }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}