Renovate: mypy updates to widen accepted version range

[intgr]

• Solves comment at https://github.com/typeddjango/django-stubs/pull/2918/files
• Already tested on djangorestframework-stubs:
  • Renovate: mypy updates to widen accepted version range djangorestframework-stubs#879
  • Update dependency mypy to >=1.13,<1.20 djangorestframework-stubs#877

Change how Renovate bumps mypy dependency.

When updating to mypy 1.19, previously it would change >=1.13,<1.19 -> >=1.19,<1.20.

With this change, it will change to >=1.13,<1.20.

Doc: https://docs.renovatebot.com/configuration-options/#rangestrategy

[intgr]

I suspect this won't work well with "rangeStrategy": "widen"

Removed this pinning in tests dependency group, as now we have uv.lock to pin dev versions. And the lockfile is updated every week by Renovate already.

[sobolevn]

Awesome, thanks for the fix!

[UnknownPlatypus]

Just a small nip around python setup but good to me for the rest