Update typing-extensions requirement from >=4.15.0 to >=4.16.0

Updates the requirements on [typing-extensions](https://github.com/python/typing_extensions) to permit the latest version.
- [Release notes](https://github.com/python/typing_extensions/releases)
- [Changelog](https://github.com/python/typing_extensions/blob/main/CHANGELOG.md)
- [Commits](python/typing_extensions@4.15.0...4.16.0)

---
updated-dependencies:
- dependency-name: typing-extensions
  dependency-version: 4.16.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -11,6 +11,6 @@ wheel
 rellu >= 2.0.2
 twine
 wheel
-typing-extensions >= 4.15.0
+typing-extensions >= 4.16.0
 approvaltests >= 18.2.0
 mypy == 2.1.0