Update typing-extensions requirement from <=4.1.1,>=4.0.0 to >=4.0.0,<4.2.1 in /requirements (#13054)
* Update typing-extensions requirement in /requirements
Updates the requirements on [typing-extensions](https://github.com/python/typing) to permit the latest version.
- [Release notes](https://github.com/python/typing/releases)
- [Changelog](https://github.com/python/typing/blob/master/typing_extensions/CHANGELOG.md)
- [Commits](https://github.com/python/typing/compare/4.0.0...4.2.0)
---
updated-dependencies:
- dependency-name: typing-extensions
dependency-type: direct:production
...
Signed-off-by: dependabot[bot] <support@github.com>