ci: configure renovate

Author: AnirudhKonduru

renovate.json

@@ -1,6 +1,26 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:recommended"
+    "config:recommended",
+    ":rebaseStalePrs",
+    ":semanticCommits",
+    ":semanticCommitScope(deps)",
+    "helpers:pinGitHubActionDigests"
+  ],
+  "baseBranches": [
+    "master"
+  ],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "managerFilePatterns": [
+        "(^|/)PKGBUILD$"
+      ],
+      "matchStrings": [
+        "_npmver=(?<currentValue>.*) # renovate: datasource=(?<datasource>.*) depName=(?<depName>.*)"
+      ],
+      "extractVersionTemplate": "^v?(?<version>.*)$",
+      "autoReplaceStringTemplate": "_npmver={{{newValue}}} # renovate: datasource={{{datasource}}} depName={{{depName}}}"
+    }
   ]
 }