Deduplicate renovate configuration

The configuration has been extracted to `cucumber/renovate-config`.

Author: mpkorstanje

.github/renovate.json

@@ -1,18 +1,7 @@
 {
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:base",
-    ":preserveSemverRanges",
-    ":rebaseStalePrs",
-    ":disableDependencyDashboard"
-  ],
-  "labels": [":robot: dependencies"],
-  "prHourlyLimit": 0,
-  "packageRules": [
-    {
-      "depTypeList": ["devDependencies", "dependencies"],
-      "updateTypes": ["major", "minor", "patch"],
-      "automerge": true,
-      "automergeType": "branch"
-    }
+    "github>cucumber/renovate-config",
+    ":automergeMajor"
   ]
 }