chore: bump @types/node from 15.3.0 to 20.9.0

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 15.3.0 to 20.9.0.
- [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

@@ -43,7 +43,7 @@
     "@commitlint/cli": "12.1.4",
     "@commitlint/config-conventional": "12.1.4",
     "@types/jest": "^26.0.20",
-    "@types/node": "^15.0.1",
+    "@types/node": "^20.9.0",
     "@types/vscode": "^1.44.0",
     "@types/ws": "^7.4.0",
     "@typescript-eslint/eslint-plugin": "^2.27.0",