Bump @types/node from 20.4.2 to 20.8.6

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 20.4.2 to 20.8.6.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -9,7 +9,7 @@
         "@types/chai-string": "^1.4.2",
         "@types/lodash": "^4.14.195",
         "@types/mocha": "^10.0.1",
-        "@types/node": "^20.4.2",
+        "@types/node": "^20.8.6",
         "@types/sinon": "^10.0.15",
         "@types/sinon-chai": "^3.2.9",
         "@typescript-eslint/eslint-plugin": "5.62.0",