add renovate bot

Author: gjtorikian

renovate.json

@@ -0,0 +1,39 @@
+{
+  "extends": [
+    "config:recommended"
+  ],
+  "dependencyDashboard": false,
+  "schedule": [
+    "on the 15th day of the month before 12pm"
+  ],
+  "timezone": "UTC",
+  "rebaseWhen": "conflicted",
+  "packageRules": [
+    {
+      "matchManagers": [
+        "github-actions"
+      ],
+      "extractVersion": "^v(?<version>\\d+\\.\\d+\\.\\d+)$"
+    },
+    {
+      "matchUpdateTypes": [
+        "minor",
+        "patch"
+      ],
+      "automerge": true,
+      "groupName": "minor and patch updates"
+    },
+    {
+      "matchUpdateTypes": [
+        "major"
+      ],
+      "automerge": false
+    },
+    {
+      "matchUpdateTypes": [
+        "digest"
+      ],
+      "automerge": false
+    }
+  ]
+}