renovate: switch to my presets

.github/renovate.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base",
+    "github>msfjarvis/shared-workflows//renovate/rust",
+    "github>msfjarvis/shared-workflows//renovate/automerge"
+  ]
+}

renovate.json

@@ -1,16 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ],
-  "packageRules": [
-    {
-      "matchPackagePatterns": ["*"],
-      "automerge": true,
-      "automergeType": "branch"
-    },
-    {
-      "matchPackagePatterns": ["serde", "serde_derive"],
-      "groupName": "serde"
-    }
-  ]
-}