This reverts commit 4a43435b.

python-fastapi is updated and unblocks anyio 4.x [1]

[1] python-fastapi@2a5b4e24

This reverts commit f9440421.

This was an accidental push. 4.x should not be on main branch until all
packages are compatible.

4.x is not yet fully supported by dependent packages. Let's keep 3.x in
main branch to avoid unexpected version upgrades during rebuilds (ex:
Python 3.12 rebuilds).

Pushed to [extra-staging] as anyio 4.x breaks python-fastapi. fastapi
pins older starlette, while the latest starlette is required for anyio
4.x support.

See: https://github.com/tiangolo/fastapi/pull/9636

See: https://github.com/agronholm/anyio/issues/550

Also switches to PEP 517, which will be needed for the next version [2]

[1] https://github.com/agronholm/anyio/issues/550
[2] https://github.com/agronholm/anyio/commit/4c125207a3432a255c5d95b62f9a63d6aca93eaa

uvloop support has been there for a long time, and curio support was
dropped as of anyio 3.0 [1]

[1] https://anyio.readthedocs.io/en/stable/faq.html#why-is-curio-not-supported-as-a-backend

[1] https://github.com/agronholm/anyio/commit/fdf3c9afd137917ff6de71b96c4753cd41c42ef7

community/python-pytest-mock is updated! [1]

[1] https://github.com/archlinux/svntogit-community/commit/bd4893695e7ed561a45505b8b892d230147e5b90

* python-httpcore: compatible since 0.13.1 https://github.com/encode/httpcore/commit/341320fbaf7cac93c7b626076c03ae834d65763b.
  check() in PKGBUILD passed with the updated anyio package as well.
* jupyter-server: compatible since 1.7.0 https://github.com/jupyter-server/jupyter_server/commit/678878f4585e65d4f3fea74562517b8c914e474c

Reported via an out-of-date message on archweb :/