Ensure renovate runs go mod tidy after updates (#19)

* Ensure renovate runs `go mod tidy` after updates

* Fix linter

Author: FollowTheProcess

.github/renovate.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:recommended"
-  ]
-}
+  "extends": ["config:recommended"],
+  "labels": ["dependencies"],
+  "postUpdateOptions": ["gomodTidy"]
+}

.github/workflows/CI.yml

@@ -19,4 +19,4 @@ jobs:
       contents: read
     uses: FollowTheProcess/ci/.github/workflows/Go.yml@v3
     with:
-      lint-tool: staticcheck
+      linter: staticcheck