Squashed 'libs/cli11/' content from commit dcbcb47

git-subtree-dir: libs/cli11
git-subtree-split: dcbcb4721dda5dab0a56d9faaaee50e6a30f7758

.github/workflows/pr_merged.yml

@@ -0,0 +1,15 @@
+name: PR merged
+on:
+  pull_request_target:
+    types: [closed]
+
+jobs:
+  label-merged:
+    name: Changelog needed
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.merged == true
+    steps:
+      - uses: actions/labeler@main
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          configuration-path: .github/labeler_merged.yml