update renovate config

hopefully I didn't write something nonsensical in the config file.

Go probably shouldn't be updated automatically because builds fail if
you don't have the new version.

Modules updates in the repo are a bit of a pain when I'm also adding new
modules locally. Will re-enable later.

renovate.json

@@ -1,5 +1,23 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["github>Japan7/renovate-config"],
-  "postUpdateOptions": ["gomodTidy"]
+  "extends": [
+    "github>Japan7/renovate-config"
+  ],
+  "postUpdateOptions": [
+    "gomodTidy"
+  ],
+  "packageRules": [
+    {
+      "matchDepNames": [
+        "go"
+      ],
+      "automerge": false
+    },
+    {
+      "matchManagers": [
+        "gomod"
+      ],
+      "automerge": false
+    }
+  ]
 }