Log message:
py-httpcore: updated to 0.13.6

0.13.6

Fixed
- Close sockets when read or write timeouts occur.

0.13.5

Fixed
- Resolved niggles with AnyIO EOF behaviours.

0.13.4

Added
- Improved error messaging when URL scheme is missing, or a non HTTP(S) scheme \ 
is used.

Fixed
- Switched to `anyio` as the default backend implementation when running with \ 
`asyncio`. Resolves some awkward [TLS timeout \ 
issues](https://github.com/encode/httpx/discussions/1511).

Log message:
py-httpcore: updated to 0.13.3

0.13.3 (May 6th, 2021)

Added

- Support HTTP/2 prior knowledge, using `httpcore.SyncConnectionPool(http1=False)`.

Fixed

- Handle cases where environment does not provide `select.poll` support.

0.13.2 (April 29th, 2021)

Added

- Improve error message for specific case of `RemoteProtocolError` where server \ 
disconnects without sending a response.

0.13.1 (April 28th, 2021)

Fixed

- More resiliant testing for closed connections.
- Don't raise exceptions on ungraceful connection closes.

0.13.0 (April 21st, 2021)

The 0.13 release updates the core API in order to match the HTTPX Transport API,
introduced in HTTPX 0.18 onwards.

An example of making requests with the new interface is:

```python
with httpcore.SyncConnectionPool() as http:
    status_code, headers, stream, extensions = http.handle_request(
        method=b'GET',
        url=(b'https', b'example.org', 443, b'/'),
        headers=[(b'host', b'example.org'), (b'user-agent', b'httpcore')]
        stream=httpcore.ByteStream(b''),
        extensions={}
    )
    body = stream.read()
    print(status_code, body)
```

Changed

- The `.request()` method is now `handle_request()`.
- The `.arequest()` method is now `.handle_async_request()`.
- The `headers` argument is no longer optional.
- The `stream` argument is no longer optional.
- The `ext` argument is now named `extensions`, and is no longer optional.
- The `"reason"` extension keyword is now named \ 
`"reason_phrase"`.
- The `"reason_phrase"` and `"http_version"` extensions now \ 
use byte strings for their values.
- The `httpcore.PlainByteStream()` class becomes `httpcore.ByteStream()`.

Added

- Streams now support a `.read()` interface.

Fixed

- Task cancelation no longer leaks connections from the connection pool.

Log message:
py-httpcore: updated to 0.12.3

0.12.3

Fixed

- Abort SSL connections on close rather than waiting for remote EOF when using \ 
`asyncio`.
- Fix exception raised in case of connect timeouts when using the `anyio` backend.
- Fix `Host` header precedence for `:authority` in HTTP/2.
- Handle extra edge case when detecting for socket readability when using `asyncio`.
- Fix `asyncio` SSL warning when using proxy tunneling.

Log message:
py-httpcore: updated to 0.12.2

0.12.2

Fixed
- Properly wrap connect errors on the asyncio backend.
- Fix `ImportError` occurring on Python 3.9 when using the HTTP/1.1 sync client \ 
in a multithreaded context.

0.12.1

Added
- Add connect retries.

Fixed
- Tweak detection of dropped connections, resolving an issue with open files \ 
limits on Linux.
- Avoid leaking connections when establishing an HTTP tunnel to a proxy has failed.
- Properly wrap OS errors when using `trio`.

Log message:
py-httpcore: updated to 0.12.0

0.12.0

Changed
- HTTP header casing is now preserved, rather than always sent in lowercase.

Added
- Add Python 3.9 to officially supported versions.

Fixed
- Gracefully handle a stdlib asyncio bug when a connection is closed while it is \ 
in a paused-for-reading state.

Log message:
py-httpcore: updated to 0.11.1

0.11.1

Fixed
- Add await to async semaphore release() coroutine
- Drop incorrect curio classifier

0.11.0

The Transport API with 0.11.0 has a couple of significant changes.

Firstly we've moved changed the request interface in order to allow extensions, \ 
which will later enable us to support features
such as trailing headers, HTTP/2 server push, and CONNECT/Upgrade connections.

The interface changes from:

```python
def request(method, url, headers, stream, timeout):
    return (http_version, status_code, reason, headers, stream)
```

To instead including an optional dictionary of extensions on the request and \ 
response:

```python
def request(method, url, headers, stream, ext):
    return (status_code, headers, stream, ext)
```

Having an open-ended extensions point will allow us to add later support for \ 
various optional features, that wouldn't otherwise be supported without these \ 
API changes.

In particular:

* Trailing headers support.
* HTTP/2 Server Push
* sendfile.
* Exposing raw connection on CONNECT, Upgrade, HTTP/2 bi-di streaming.
* Exposing debug information out of the API, including template name, template \ 
context.

Currently extensions are limited to:

* request: `timeout` - Optional. Timeout dictionary.
* response: `http_version` - Optional. Include the HTTP version used on the response.
* response: `reason` - Optional. Include the reason phrase used on the response. \ 
Only valid with HTTP/1.*.

See https://github.com/encode/httpx/issues/1274#issuecomment-694884553 for the \ 
history behind this.

Secondly, the async version of `request` is now namespaced as `arequest`.

This allows concrete transports to support both sync and async implementations \ 
on the same class.

Added
- Add curio support.
- Add anyio support, with `backend="anyio"`.

Changed
- Update the Transport API to use 'ext' for optional extensions.
- Update the Transport API to use `.request` and `.arequest` so implementations \ 
can support both sync and async.

0.10.2

Added
- Added Unix Domain Socket support.

Fixed
- Always include the port on proxy CONNECT requests.
- Fix `max_keepalive_connections` configuration.
- Fixes behaviour in HTTP/1.1 where server disconnects can be used to signal the \ 
end of the response body.

0.10.1
- Include `max_keepalive_connections` on `AsyncHTTPProxy`/`SyncHTTPProxy` classes.

0.10.0

The most notable change in the 0.10.0 release is that HTTP/2 support is now \ 
fully optional.

Use either `pip install httpcore` for HTTP/1.1 support only, or `pip install \ 
httpcore[http2]` for HTTP/1.1 and HTTP/2 support.

Added
- HTTP/2 support becomes optional.
- Add `local_address=...` support.
- Add `PlainByteStream`, `IteratorByteStream`, `AsyncIteratorByteStream`. The \ 
`AsyncByteSteam` and `SyncByteStream` classes are now pure interface classes.
- Add `LocalProtocolError`, `RemoteProtocolError` exceptions.
- Add `UnsupportedProtocol` exception.
- Add `.get_connection_info()` method.
- Add better TRACE logs.

Changed
- `max_keepalive` is deprecated in favour of `max_keepalive_connections`.

Fixed
- Improve handling of server disconnects.

Log message:
py-httpcore: added version 0.9.1

The HTTP Core package provides a minimal low-level HTTP client, which does one
thing only. Sending HTTP requests.

It does not provide any high level model abstractions over the API, does not
handle redirects, multipart uploads, building authentication headers,
transparent HTTP caching, URL parsing, session cookie handling, content or
charset decoding, handling JSON, environment based configuration defaults, or
any of that Jazz.

Some things HTTP Core does do:
* Sending HTTP requests.
* Provides both sync and async interfaces.
* Supports HTTP/1.1 and HTTP/2.
* Async backend support for asyncio and trio.
* Automatic connection pooling.
* HTTP(S) proxy support.