Configure Renovate (#248)

* Add renovate.json

* Renovate only utls

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Andy Wang <cbeuw.andy@gmail.com>

renovate.json

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "packageRules": [
+    {
+      "packagePatterns": ["*"],
+      "excludePackagePatterns": ["utls"],
+      "enabled": false
+    }
+  ]
+}