Add automatic merge workflow

.github/workflows/automatic-merge.yml

@@ -0,0 +1,22 @@
+name: Automatic Merge
+
+on:
+  schedule:
+    # Every day at midnight
+    - cron: "0 0 * * *"
+    # Every full hour
+    #- cron: "0 * * * *"
+
+jobs:
+  merge:
+    name: Automatic pull request merges
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Merge ready PRs
+        uses: pascalgn/automerge-action@135f0bdb927d9807b5446f7ca9ecc2c51de03c4a
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          MERGE_LABELS: "automation"
+          MERGE_METHOD: "squash"
+          MERGE_DELETE_BRANCH: "true"