build(deps-dev): bump @betterer/typescript from 5.3.6 to 5.4.0

Bumps [@betterer/typescript](https://github.com/phenomnomnominal/betterer) from 5.3.6 to 5.4.0.
- [Changelog](https://github.com/phenomnomnominal/betterer/blob/master/CHANGELOG.md)
- [Commits](phenomnomnominal/betterer@v5.3.6...v5.4.0)

---
updated-dependencies:
- dependency-name: "@betterer/typescript"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>