Update typer requirement from <0.20 to <0.21

Updates the requirements on [typer](https://github.com/fastapi/typer) to permit the latest version.
- [Release notes](https://github.com/fastapi/typer/releases)
- [Changelog](https://github.com/fastapi/typer/blob/master/docs/release-notes.md)
- [Commits](https://github.com/fastapi/typer/compare/0.0.2...0.20.0

)

---
updated-dependencies:
- dependency-name: typer
  dependency-version: 0.20.0
  dependency-type: direct:development
...

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