Bump @types/node from 18.7.23 to 20.8.6

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 18.7.23 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-major
...

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

package.json

@@ -35,7 +35,7 @@
   "module": "dist/wp2md.esm.js",
   "devDependencies": {
     "@types/js-yaml": "^4.0.0",
-    "@types/node": "^18.7.23",
+    "@types/node": "^20.8.6",
     "@types/progress": "^2.0.3",
     "@types/turndown": "^5.0.0",
     "husky": "^4.3.7",