TypeScript 5.9

[osyrisrblx]

Latest ts-expose-internals version is 5.6.3.
TypeScript just released 5.9.2.

[osyrisrblx]

Looks like the latest GitHub Actions runs failed due to

Error: This request has been automatically failed because it uses a deprecated version of `actions/cache: v2`. Please update your workflow to use v3/v4 of actions/cache to avoid interruptions. Learn more: https://github.blog/changelog/2024-12-05-notice-of-upcoming-releases-and-breaking-changes-for-github-actions/#actions-cache-v1-v2-and-actions-toolkit-cache-package-closing-down

I'm not certain this is the only issue, but I'll create a PR to upgrade to v4.