build(deps-dev): bump typing-extensions from 4.0.0 to 4.0.1

Bumps [typing-extensions](https://github.com/python/typing) from 4.0.0 to 4.0.1.
- [Release notes](https://github.com/python/typing/releases)
- [Changelog](https://github.com/python/typing/blob/master/typing_extensions/CHANGELOG)
- [Commits](python/typing@4.0.0...4.0.1)

---
updated-dependencies:
- dependency-name: typing-extensions
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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