fix: automerge for dependabot (#2677)

.github/dependabot.yml

@@ -5,5 +5,3 @@ updates:
   schedule:
     interval: daily
   open-pull-requests-limit: 10
-  labels:
-    - "dependabot"

.github/workflows/ci.yml

@@ -57,3 +57,25 @@ jobs:
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           parallel-finished: true
+
+  automerge:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dependabot Auto Merge
+        uses: actions/github-script@v3
+        if: ${{ github.actor == 'dependabot[bot]' }}
+        with:
+          github-token: ${{secrets.github_token}}
+          script: |
+            github.pulls.createReview({
+              owner: context.payload.repository.owner.login,
+              repo: context.payload.repository.name,
+              pull_number: context.payload.pull_request.number,
+              event: 'APPROVE'
+            })
+            github.pulls.merge({
+              owner: context.payload.repository.owner.login,
+              repo: context.payload.repository.name,
+              pull_number: context.payload.pull_request.number
+            })