chore: automatically merge Dependabot PR if tests pass

.github/workflows/test-and-merge.yml

@@ -0,0 +1,36 @@
+name: test
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [ '12', '14', '16' ]
+    name: Node ${{ matrix.node }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup node
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+      - run: npm install
+      - run: npm test
+  automerge:
+    needs: test
+    name: Merge Dependabot Pull Pequest
+    runs-on: ubuntu-latest
+    if: ${{ success() && github.event_name == 'pull_request_target' && github.actor == 'dependabot[bot]' }}
+    steps:
+      - name: Merge
+        uses: actions/github-script@v5
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          script: |
+            github.rest.pulls.merge({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.issue.number,
+              merge_method: 'squash'
+            })