Port automerge functionality from quantumlibraries.

.github/workflows/automerge.yml

@@ -0,0 +1,38 @@
+# This action allows using the automerge label to automatically merge in pull requests that have been reviewed and that pass
+# status checks (similar to the autocomplete functionality of Azure DevOps).
+name: automerge
+on:
+  pull_request:
+    # Note that we only support automerge on branches that have required checks.
+    branches: 
+      - master
+      - feature/*
+    types:
+      - labeled
+      - unlabeled
+      - synchronize
+      - opened
+      - edited
+      - ready_for_review
+      - reopened
+      - unlocked
+  pull_request_review:
+    # Note that we only support automerge on branches that have required checks.
+    branches: 
+      - master
+      - feature/*
+    types:
+      - submitted
+  check_suite:
+    types:
+      - completed
+  status: {}
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    steps:
+      - name: automerge
+        uses: "pascalgn/automerge-action@4536e8847eb62fe2f0ee52c8fa92d17aa97f932f"
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          MERGE_METHOD: squash