chore(deps): update dependency @types/node to v20 (probot#287)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[@types/node](https://togithub.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node)
([source](https://togithub.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node))
| [`^18.19.14` ->
`^20.0.0`](https://renovatebot.com/diffs/npm/@types%2fnode/18.19.14/20.11.16)
|
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|
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|
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package.json

@@ -30,7 +30,7 @@
   "devDependencies": {
     "@octokit/tsconfig": "^2.0.0",
     "@types/eventsource": "^1.1.15",
-    "@types/node": "^18.19.14",
+    "@types/node": "^20.0.0",
     "@types/validator": "^13.11.6",
     "@vitest/coverage-v8": "^1.0.0",
     "fastify": "^4.24.3",