Configure renovate

Author: trygve-lie

renovate.json

@@ -1,5 +1,23 @@
 {
   "extends": [
-    "github>finn-no/renovate-presets:js"
-  ]
+    "config:base",
+    "group:linters"
+  ],
+  "packageRules": [{
+    "depTypeList": ["dependencies"],
+    "automerge": true,
+    "major": {
+      "automerge": false
+    }
+  },
+  {
+    "depTypeList": ["devDependencies"],
+    "schedule": ["before 4am on monday"],
+    "commitMessage": "Dev dependency {{depName}} updated to version {{newValue}}",
+    "prTitle": "Dev dependency update: {{depName}}",
+    "automerge": true,
+    "major": {
+      "automerge": false
+    }
+  }]
 }