chore(repo): enable automerge for renovate prs

only automerges digest updates and minor / patch dependency updates. everything else will have to be manually reviewed by yours truly, to avoid breakages

renovate.json

@@ -2,5 +2,11 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "local>cc/renovate-config"
+  ],
+  "packageRules": [
+    {
+      "matchUpdateTypes": ["minor", "patch", "digest"],
+      "automerge": true
+    }
   ]
 }