batch dependency updates

Author: keithamus

.github/renovate.json

@@ -0,0 +1,11 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:base"],
+  "packageRules": [
+    {
+      "matchDepTypes": ["devDependencies"],
+      "groupName": "devDependencies",
+      "schedule": ["before 9am on monday"]
+    }
+  ]
+}