gitdb>=4.0.1,<5
typing-extensions>=3.7.4.3;python_version<"3.10"

gitdb>=4.0.1,<5
typing-extensions>=3.7.4.3;python_version<"3.8"

Revert the use of typing_extensions in py3.8+
Revert the use of typing_extensions in py3.8+

The original change requiring py3.10 TypeGuard (and matching
typing_extensions) has been reverted, so revert the requirement
on typing_extensions as well.
