Missing typing_extensions dependency

[Choms]

Hey,

In the last release (3.0.0...3.1.0) you added a import from typing_extensions but forgot to update the dependencies, so now on a fresh install, unless I specify it on my requirements, I'm getting the following error:

 from ulid import ULID
 /usr/local/lib/python3.13/site-packages/ulid/__init__.py:16: in <module>
 from typing_extensions import Self
 E   ModuleNotFoundError: No module named 'typing_extensions' 

Cheers!

[rohitrhmn1]

Requested this feature in this pull request: #47