enable renovate automerge for non-major package updates

renovate.json

@@ -1,4 +1,17 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["github>thegeeklab/renovate-presets:docker"]
+  "extends": ["github>thegeeklab/renovate-presets:docker"],
+  "packageRules": [
+    {
+      "description": "Automerge non-major package updates",
+      "matchPackageNames": [
+        "prettier",
+        "yamllint",
+        "hairyhenderson/gomplate",
+        "yannh/kubeconform"
+      ],
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true
+    }
+  ]
 }