Configure Renovate (#4)

* Add renovate.json

* Update renovate.json

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Ed Harrod <echarrod@users.noreply.github.com>

renovate.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "constraints": {
+    "go": "1.21"
+  },
+  "branchConcurrentLimit": 1,
+  "ignoreUnstable": true,
+  "labels":["bot::renovate"],
+  "semanticCommits":  "disabled",
+  "commitMessagePrefix": "renovate",
+  "postUpdateOptions": [
+    "gomodTidy",
+    "gomodUpdateImportPaths"
+  ]
+}