chore: add config (#14)

Author: ns-vasilev

renovate.json

@@ -2,5 +2,31 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:recommended"
+  ],
+  "schedule": [
+    "before 5am on monday"
+  ],
+  "labels": [
+    "dependencies"
+  ],
+  "semanticCommits": "enabled",
+  "semanticCommitType": "chore",
+  "semanticCommitScope": "deps",
+  "prConcurrentLimit": 5,
+  "packageRules": [
+    {
+      "description": "Group GitHub Actions updates",
+      "matchManagers": [
+        "github-actions"
+      ],
+      "groupName": "github actions"
+    },
+    {
+      "description": "Group Mint tools (SwiftLint, SwiftFormat)",
+      "matchManagers": [
+        "mint"
+      ],
+      "groupName": "mint tools"
+    }
   ]
 }