Dependency on `overrides` causes crash for Python 3.14

[edrogers]

Description

Python 3.14 is scheduled to be released later this year. The dependency on overrides is a problem, as it raises an AttributeError when it is imported under Python 3.14. An issue has been raised and a pull request has been submitted to the GitHub repo for the overrides project. But the maintainer has been unresponsive.

Reproduce

To reproduce, attempt to use this package in any way with a Python 3.14 pre-release.

Using uv, this might look like:

uv run --python 3.14.0b1 --extra test python -m pytest

Expected behavior

Not raising an AttributeError when using in Python 3.14 pre-release.

Context

• Operating System and version: Ubuntu 22.04.5 LTS
• Browser and version: N/A
• Jupyter Server version: All versions 2.6.0 and after, including current latest release

Troubleshoot Output

sys.version:
        3.14.0b1 (main, Jun  4 2025, 17:38:18) [Clang 20.1.4 ]
platform.platform():
Linux-6.8.0-60-generic-x86_64-with-glibc2.35

Command Line Output

N/A

Browser Output

N/A