Log Message:
py-httpx: updated to 0.18.1

0.18.1 (29th April, 2021)

Changed

* Update brotli support to use the `brotlicffi` package
* Ensure that `Request(..., stream=...)` does not auto-generate any headers on \ 
the request instance.

Fixed

* Pass through `timeout=...` in top-level httpx.stream() function.
* Map httpcore transport close exceptions to httpx exceptions.

0.18.0 (27th April, 2021)

The 0.18.x release series formalises our low-level Transport API, introducing \ 
the base classes `httpx.BaseTransport` and `httpx.AsyncBaseTransport`.

See the "[Writing custom \ 
transports](https://www.python-httpx.org/advanced/#writing-custom-transports)" \ 
documentation and the \ 
[`httpx.BaseTransport.handle_request()`](https://github.com/encode/httpx/blob/397aad98fdc8b7580a5fc3e88f1578b4302c6382/httpx/_transports/base.py#L77-L147) \ 
docstring for more complete details on implementing custom transports.

Pull request 1522 includes a checklist of differences from the previous \ 
`httpcore` transport API, for developers implementing custom transports.

The following API changes have been issuing deprecation warnings since 0.17.0 \ 
onwards, and are now fully deprecated...

* You should now use httpx.codes consistently instead of httpx.StatusCodes.
* Use limits=... instead of pool_limits=....
* Use proxies={"http://": ...} instead of proxies={"http": \ 
...} for scheme-specific mounting.

Changed

* Transport instances now inherit from `httpx.BaseTransport` or \ 
`httpx.AsyncBaseTransport`,
  and should implement either the `handle_request` method or \ 
`handle_async_request` method.
* The `response.ext` property and `Response(ext=...)` argument are now named \ 
`extensions`.
* The recommendation to not use `data=<bytes|str|bytes (a)iterator>` in \ 
favour of `content=<bytes|str|bytes (a)iterator>` has now been escalated \ 
to a deprecation warning.
* Drop `Response(on_close=...)` from API, since it was a bit of leaking \ 
implementation detail.
* When using a client instance, cookies should always be set on the client, \ 
rather than on a per-request basis. We prefer enforcing a stricter API here \ 
because it provides clearer expectations around cookie persistence, particularly \ 
when redirects occur.
* The runtime exception `httpx.ResponseClosed` is now named `httpx.StreamClosed`.
* The `httpx.QueryParams` model now presents an immutable interface. There is a \ 
discussion on [the design and motivation \ 
here](https://github.com/encode/httpx/discussions/1599). Use `client.params = \ 
client.params.merge(...)` instead of `client.params.update(...)`. The basic \ 
query manipulation methods are `query.set(...)`, `query.add(...)`, and \ 
`query.remove()`.

Added

* The `Request` and `Response` classes can now be serialized using pickle.
* Handle `data={"key": [None|int|float|bool]}` cases.
* Support `httpx.URL(**kwargs)`, for example \ 
`httpx.URL(scheme="https", host="www.example.com", \ 
path="/')`, or `httpx.URL("https://www.example.com/", \ 
username="tom@gmail.com", password="123 456")`.
* Support `url.copy_with(params=...)`.
* Add `url.params` parameter, returning an immutable `QueryParams` instance.
* Support query manipulation methods on the URL class. These are \ 
`url.copy_set_param()`, `url.copy_add_param()`, `url.copy_remove_param()`, \ 
`url.copy_merge_params()`.
* The `httpx.URL` class now performs port normalization, so `:80` ports are \ 
stripped from `http` URLs and `:443` ports are stripped from `https` URLs.
* The `URL.host` property returns unicode strings for internationalized domain \ 
names. The `URL.raw_host` property returns byte strings with IDNA escaping \ 
applied.

Fixed

* Fix Content-Length for cases of `files=...` where unicode string is used as \ 
the file content.
* Fix some cases of merging relative URLs against `Client(base_url=...)`.
* The `request.content` attribute is now always available except for streaming \ 
content, which requires an explicit `.read()`.