Introduce renovate.json

Author: dkropachev

renovate.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "rebaseWhen": "never",
+  "prConcurrentLimit": 2
+}