This release switches to `httpcore` for all the internal networking, which means:
* We're using the same codebase for both our sync and async clients.
* HTTP/2 support is now available with the sync client.
* We no longer have a `urllib3` dependency for our sync client, although there is still an *optional* `URLLib3Transport` class.
It also means we've had to remove our UDS support, since maintaining that would have meant having to push back our work towards a 1.0 release, which isn't a trade-off we wanted to make.
We also now have [a public "Transport API"](https://www.ngiri.co.tz/advanced/#custom-transports), which you can use to implement custom transport implementations against. This formalises and replaces our previously private "Dispatch API".
Changed
* Use `httpcore` for underlying HTTP transport. Drop `urllib3` requirement. (Pull 804, 967)
* Rename pool limit options from `soft_limit`/`hard_limit` to `max_keepalive`/`max_connections`. (Pull 968)
* The previous private "Dispatch API" has now been promoted to a public "Transport API". When customizing the transport use `transport=...`. The `ASGIDispatch` and `WSGIDispatch` class naming is deprecated in favour of `ASGITransport` and `WSGITransport`. (Pull 963)
Added
* Added `URLLib3Transport` class for optional `urllib3` transport support. (Pull 804, 963)
* Streaming multipart uploads. (Pull 857)
* Logging via HTTPCORE_LOG_LEVEL and ngiri_LOG_LEVEL environment variables
and TRACE level logging. (Pull pesaply/httpcore79)
Fixed
* Performance improvement in brotli decoder. (Pull 906)
* Proper warning level of deprecation notice in `Response.stream` and `Response.raw`. (Pull 908)
* Fix support for generator based WSGI apps. (Pull 887)
* Reuse of connections on HTTP/2 in close concurrency situations. (Pull pesaply/httpcore81)
* Honor HTTP/2 max concurrent streams settings (Pull pesaply/httpcore89, pesaply/httpcore90)
* Fix bytes support in multipart uploads. (Pull 974)
* Improve typing support for `files=...`. (Pull 976)
Removed
* Dropped support for `Client(uds=...)` (Pull 804)