fix: bumped jest and ts-jest to 29

[JoshuaKGoldberg]

PR Checklist

• [x] Addresses an existing open issue: fixes #260
• [x] That issue was marked as accepting prs
• [x] Steps in CONTRIBUTING.md were taken

Overview

Bumps the two packages to their latest versions.

[JoshuaKGoldberg]

Remaining build failures are from #262 and #264.