chore(renovate): set update schedule to monthly and group related updates together

.github/renovate.json5

@@ -0,0 +1,18 @@
+{
+  "extends": [
+    // Use pre-determined best practices, including some groupings and github action digest pinning - https://docs.renovatebot.com/presets-config/#configbest-practices
+    "config:best-practices",
+    // Create version bump PRs on a monthly basis - https://docs.renovatebot.com/presets-schedule/#schedulemonthly
+    "schedule:monthly",
+  ],
+  // packageRules take precedence (override 'extends' configs)
+  "packageRules": [
+    // Group all patch updates together - there doesn't seem to be an existing preset for this
+    {
+      "matchUpdateTypes": ["patch"],
+      "groupName": "all patch updates"
+    }
+  ],
+  // Increase compatibility with other projects - https://docs.renovatebot.com/modules/manager/gleam/#recommended-rangestrategy-for-apps-and-libraries
+  "rangeStrategy": "widen",
+}