build(deps-dev): bump ts-api-utils from 1.0.3 to 1.2.1 (#312)

Bumps [ts-api-utils](https://github.com/JoshuaKGoldberg/ts-api-utils) from 1.0.3 to 1.2.1.
- [Release notes](https://github.com/JoshuaKGoldberg/ts-api-utils/releases)
- [Changelog](https://github.com/JoshuaKGoldberg/ts-api-utils/blob/main/CHANGELOG.md)
- [Commits](https://github.com/JoshuaKGoldberg/ts-api-utils/commits/v1.2.1)

---
updated-dependencies:
- dependency-name: ts-api-utils
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>