Support newer versions of httpcore

[paulschreiber]

Summary

Support newer versions of httpcore. httpcore 1.0.0 was release October 6, 2023.

Fixes #2884.

[tomchristie]

Thanks. 🙂

So... from httpcore 1.0 onwards, the async dependencies are optional.
The minimal version of this probably needs to use httpcore[asyncio,trio] as a dependency.

Although actually we want to push through and have httpx[asyncio] and httpx[trio] become optionals...

See #2858

[tomchristie]

Referring back to my previous review :)

This pull request should require both 'httpcore' and 'anyio'. (Effectively the same as requiring 'httpcore[asyncio]')
We could choose to roll a release from that point if we wanted too. 0.25.1 should be fine - we don't have any API breaking changes here, just a dependency upgrade.

Actually what we really want is PR #2858, which addresses this more comprehensively with the async dependencies no longer included by default. Tho we can treat that as a follow-up aimed at the upcoming 1.0 release.

See #947 (comment)

[tomchristie]

My suggestion here would be...

• Either add anyio to the dependencies list, or use httpcore[asyncio].
• Add "update httpcore dependency" to the CHANGELOG.

And then we follow up with a new minor point release.

[tomchristie]

I'm happy to roll a minor point release with this if the above suggestions are resolved.
Alternatively we can pass on this and merge #2858 with a new major release planned.

(We'll do that either way, but we can have an interim release if we want.)

[tomchristie]

Okay I think if we update the CHANGELOG.md as part of this pull request, then we should merge this and roll an 0.25.1 release.

[T-256]

Don't we need to pin version for httpcore and anyio here?

[tomchristie]

If we want pinning here then...

• We should probably pin anyio to the >=4.0.0,<5.0.0 range.
• We can pin httpcore to the >=1.0.0,<2.0.0 range. (Actually I think we can go lower than that, but...)