Configure Renovate (#5)

* chore(deps): add renovate.json

Co-authored-by: Peter Trifanov <[email protected]>

Author: renovate[bot]

renovate.json

@@ -0,0 +1,13 @@
+{
+  "enabled": true,
+  "schedule": [
+    "before 4am on Saturday"
+  ],
+  "packageRules": [
+    {
+      "managers": ["github-actions"],
+      "groupName": "all github actions",
+      "groupSlug": "all-github-actions"
+    }
+  ]
+}