Update renovate.json

Author: inokawa

renovate.json

@@ -1,11 +1,13 @@
 {
-  "extends": ["config:base"],
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended",
+    "schedule:monthly",
+    ":pinOnlyDevDependencies"
+  ],
   "timezone": "Asia/Tokyo",
-  "schedule": ["monthly"],
-  "minor": {
-    "automerge": true
-  },
-  "patch": {
-    "automerge": true
+  "automerge": true,
+  "major": {
+    "automerge": false
   }
 }