feat: enable lock file maintenance in renovate.json

Author: 🎲

renovate.json

@@ -1,6 +1,8 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:recommended"
-  ]
-}
+  "extends": ["config:recommended"],
+  "lockFileMaintenance": {
+    "enabled": true,
+    "automerge": true
+  }
+}