👷 Add workflow

Author: gluons

.github/workflows/dependabot.yml

@@ -0,0 +1,31 @@
+name: Dependabot Automerge PR
+on:
+  pull_request:
+    types:
+      - labeled
+      - unlabeled
+      - synchronize
+      - opened
+      - edited
+      - ready_for_review
+      - reopened
+      - unlocked
+    branches:
+      - master
+  check_suite:
+    types:
+      - completed
+  status: {}
+
+jobs:
+  automerge:
+    name: Dependabot Automerge
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    env:
+      GITHUB_TOKEN: ${{ github.token }}
+      MERGE_LABELS: "dependencies"
+      MERGE_COMMIT_MESSAGE: "🔀 Automerge pull request #${{ github.event.pull_request.number }}"
+    steps:
+      - name: Automerge
+        uses: pascalgn/automerge-action@v0.9.0