Add renovate.json5

Author: fisker

.github/renovate.json5

@@ -0,0 +1,14 @@
+{
+  $schema: 'https://docs.renovatebot.com/renovate-schema.json',
+  dependencyDashboardApproval: true,
+  packageRules: [
+    {
+      groupName: 'devDependencies',
+      matchDepTypes: ['devDependencies'],
+    },
+    {
+      groupName: 'GitHub Actions',
+      matchManagers: ['github-actions'],
+    },
+  ],
+}