Update dependency rimraf to v4 (#47)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [rimraf](https://github.com/isaacs/rimraf) | devDependencies | major | [`^3.0.2` -> `^4.0.0`](https://renovatebot.com/diffs/npm/rimraf/3.0.2/4.1.1) |

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package.json

@@ -29,7 +29,7 @@
     "exec-bin": "^1.0.0",
     "hugo-installer": "^4.0.0",
     "markdownlint-cli": "^0.32.0",
-    "rimraf": "^3.0.2"
+    "rimraf": "^4.0.0"
   },
   "otherDependencies": {
     "hugo": "0.91.1"