Bump @ava/typescript from 3.0.1 to 4.0.0 (#1576)

* Bump @ava/typescript from 3.0.1 to 4.0.0

Bumps [@ava/typescript](https://github.com/avajs/typescript) from 3.0.1 to 4.0.0.
- [Release notes](https://github.com/avajs/typescript/releases)
- [Commits](avajs/typescript@v3.0.1...v4.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

* Update checked-in dependencies

---------

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