chore: Configure Renovate (#4)

* Add renovate.json

* chore: add some presets to renovate

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Günther Wannenmacher <[email protected]>
Co-authored-by: Maximilian Techritz <[email protected]>

Author: 3 people

renovate.json

@@ -0,0 +1,31 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "git-submodules": {
+    "enabled": true
+  },
+  "minimumReleaseAge": "0 days",
+  "extends": [
+    "config:recommended",
+    "config:best-practices",
+    "security:openssf-scorecard",
+    "helpers:pinGitHubActionDigests",
+    ":rebaseStalePrs"
+  ],
+  "postUpdateOptions": [
+    "gomodTidy"
+  ],
+  "packageRules": [
+    {
+      "matchManagers": [
+        "gomod"
+      ],
+      "matchDepNames": [
+        "go"
+      ],
+      "matchDepTypes": [
+        "golang"
+      ],
+      "rangeStrategy": "bump"
+    }
+  ]
+}