ci: auto-merge patch updates (#43)

Author: acidghost

.github/workflows/lcm.yml

@@ -0,0 +1,31 @@
+name: LCM
+
+on:
+  pull_request: {}
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: |
+      github.event.pull_request.user.login == 'dependabot[bot]' &&
+      github.repository == 'acidghost/a555watch'
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@08eff52bf64351f401fb50d4972fa95b9f2c2d1b # v2.4.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Approve and enable auto-merge
+        if: steps.metadata.outputs.update-type == 'version-update:semver-patch'
+        run: |
+          echo "Approving PR"
+          gh pr review --approve "$PR_URL"
+          echo "Enabling auto-merge"
+          gh pr merge --auto --squash "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}