Automerge dependabot and add Github actions to dependabot (#374)

Author: BenjaminMichaelis

.github/dependabot.yml

@@ -3,4 +3,9 @@ updates:
   - package-ecosystem: "nuget" # See documentation for possible values
     directory: "/" # Location of package manifests
     schedule:
-      interval: "daily"
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly" 

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

@@ -36,3 +36,14 @@ jobs:
         run: dotnet build --no-restore
       - name: Test
         run: dotnet test --no-build --no-restore --verbosity normal
+
+  automerge:
+    needs: [build-and-test]
+    runs-on: ubuntu-latest
+
+    permissions:
+      pull-requests: write
+      contents: write
+
+    steps:
+      - uses: fastify/github-action-merge-dependabot@v3.4.1