Merge pull request #3248 from crobibero/dependabot2

Add dependabot

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+updates:
+- package-ecosystem: nuget
+  directory: "/"
+  schedule:
+    interval: weekly
+    time: '12:00'
+  open-pull-requests-limit: 10
+