chore: add renovate (#349)

Author: 43081j

.github/renovate.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "packageRules": [
+    {
+      "groupName": "dependencies",
+      "matchUpdateTypes": [
+        "minor",
+        "patch"
+      ],
+      "schedule": [
+        "before 9am on monday"
+      ]
+    }
+  ]
+}