Update build-and-test.yml

Author: BenjaminMichaelis

.github/workflows/build-and-test.yml

@@ -32,3 +32,14 @@ jobs:
       run: dotnet build -p:ContinuousIntegrationBuild=True --no-restore --configuration Release
     - name: Test
       run: dotnet test --no-build --configuration Release --verbosity normal
+
+  automerge:
+    needs: [build-and-test]
+    runs-on: ubuntu-latest
+
+    permissions:
+      pull-requests: write
+      contents: write
+
+    steps:
+      - uses: fastify/[email protected]