chore: add renovate configuration file

Author: xMoelletschi

renovate.json

@@ -0,0 +1,11 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended",
+    "group:allNonMajor"
+  ],
+  "reviewers": ["xMoelletschi"],
+  "postUpdateOptions": ["gomodTidy"],
+  "dependencyDashboardLabels": ["renovate"],
+  "labels": ["renovate"]
+}