devel/py-ordered-set: convert to USE_PYTHON=pep517

[vishwin]

Summary

setup.py only still exists for some kind of legacy compatibility; the package itself uses flit-core to build. The correct pytest configuration is included in the PEP-517 configuration.

While here, update WWW

Test Plan

Verified no functional changes.

[rfyu28uyeg_snkmail.com]

This works fine with py38 and py311, including tests.

[allanjude]

This seems fine, is there a reason it is not moving forward?

[rfyu28uyeg_snkmail.com]

In D46235#1118265, @allanjude wrote:

This seems fine, is there a reason it is not moving forward?

I don't think so (except maybe ENOTIME). It's very much low hanging fruit and marked as a blocker or helps for some pending python updates that could really stand to get unstuck (like bug 270358, bug 270510, not to mention the bug for this: 280661).