Configure Renovate (#114)

Author: renovate[bot]

.github/renovate.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "packageRules": [
+    {
+      "matchSourceUrls": [ "https://github.com/nunit/nunit"],
+      "groupName": "NUnit"
+    },
+    {
+      "matchSourceUrls": [ "https://github.com/nunit/nunit-console"],
+      "groupName": "NUnit.Console"
+    }
+  ]
+}