chore: add renovate config to group the updates

Author: aminya

.github/renovate.json

@@ -0,0 +1,12 @@
+{
+  "packageRules": [
+    {
+      "matchDepTypes": ["devDependencies"],
+      "groupName": "devDependencies"
+    },
+    {
+      "matchDepTypes": ["dependencies"],
+      "groupName": "dependencies"
+    }
+  ]
+}