DeprecationWarnings from httpx >= 0.27

[heirecka]

running the tests with httpx 0.27 installed fails due to warning being errors and encode/httpx@cabd1c0, e.g.:

_______________________________________________________________________________ test_message_logger _______________________________________________________________________________

caplog = <_pytest.logging.LogCaptureFixture object at 0x734f65191810>

    @pytest.mark.anyio
    async def test_message_logger(caplog):
        async def app(scope, receive, send):
            await receive()
            await send({"type": "http.response.start", "status": 200, "headers": []})
            await send({"type": "http.response.body", "body": b"", "more_body": False})
    
        with caplog_for_logger(caplog, "uvicorn.asgi"):
            caplog.set_level(TRACE_LOG_LEVEL, logger="uvicorn.asgi")
            caplog.set_level(TRACE_LOG_LEVEL)
    
            app = MessageLoggerMiddleware(app)
>           async with httpx.AsyncClient(app=app, base_url="http://testserver") as client:

tests/middleware/test_message_logger.py:21: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <httpx.AsyncClient object at 0x734f65129150>

    def __init__(
        self,
        *,
        auth: AuthTypes | None = None,
        params: QueryParamTypes | None = None,
        headers: HeaderTypes | None = None,
        cookies: CookieTypes | None = None,
        verify: VerifyTypes = True,
        cert: CertTypes | None = None,
        http1: bool = True,
        http2: bool = False,
        proxy: ProxyTypes | None = None,
        proxies: ProxiesTypes | None = None,
        mounts: None | (typing.Mapping[str, AsyncBaseTransport | None]) = None,
        timeout: TimeoutTypes = DEFAULT_TIMEOUT_CONFIG,
        follow_redirects: bool = False,
        limits: Limits = DEFAULT_LIMITS,
        max_redirects: int = DEFAULT_MAX_REDIRECTS,
        event_hooks: None
        | (typing.Mapping[str, list[typing.Callable[..., typing.Any]]]) = None,
        base_url: URLTypes = "",
        transport: AsyncBaseTransport | None = None,
        app: typing.Callable[..., typing.Any] | None = None,
        trust_env: bool = True,
        default_encoding: str | typing.Callable[[bytes], str] = "utf-8",
    ) -> None:
        super().__init__(
            auth=auth,
            params=params,
            headers=headers,
            cookies=cookies,
            timeout=timeout,
            follow_redirects=follow_redirects,
            max_redirects=max_redirects,
            event_hooks=event_hooks,
            base_url=base_url,
            trust_env=trust_env,
            default_encoding=default_encoding,
        )
    
        if http2:
            try:
                import h2  # noqa
            except ImportError:  # pragma: no cover
                raise ImportError(
                    "Using http2=True, but the 'h2' package is not installed. "
                    "Make sure to install httpx using `pip install httpx[http2]`."
                ) from None
    
        if proxies:
            message = (
                "The 'proxies' argument is now deprecated."
                " Use 'proxy' or 'mounts' instead."
            )
            warnings.warn(message, DeprecationWarning)
            if proxy:
                raise RuntimeError("Use either `proxy` or 'proxies', not both.")
    
        if app:
            message = (
                "The 'app' shortcut is now deprecated."
                " Use the explicit style 'transport=ASGITransport(app=...)' instead."
            )
>           warnings.warn(message, DeprecationWarning)
E           DeprecationWarning: The 'app' shortcut is now deprecated. Use the explicit style 'transport=ASGITransport(app=...)' instead.

/usr/lib/python3.11/site-packages/httpx/_client.py:1426: DeprecationWarning
_____________________________________________________________________________ test_message_logger_exc _____________________________________________________________________________