automate dependent bot (#38)

.github/workflows/changelog.yml

@@ -19,5 +19,3 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: dangoslen/changelog-enforcer@v3
-        with:
-          skipLabels: Skip-Changelog,dependencies

.github/workflows/dependabot.yml

@@ -0,0 +1,33 @@
+name: Dependabot
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+      - name: Add a label for all production dependencies
+        if: ${{ steps.metadata.outputs.dependency-type == 'direct:production' }}
+        run: gh pr edit "$PR_URL" --add-label "Skip-Changelog"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+      - name: Approve a PR
+        run: gh pr review --approve "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+      - name: Enable auto-merge for Dependabot PRs
+        if: ${{contains(steps.metadata.outputs.dependency-names, 'my-dependency') && steps.metadata.outputs.update-type == 'version-update:semver-patch'}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}