Update httpx requirement from ==0.17.* to ==0.19.*

[dependabot]

Updates the requirements on httpx to permit the latest version.

Release notes

Sourced from httpx's releases.

Version 0.19.0

0.19.0 (19th August, 2021)

Added

• Add support for Client(allow_redirects=<bool>). (Pull #1790)
• Add automatic character set detection, when no charset is included in the response Content-Type header. (Pull #1791)

Changed

• Event hooks are now also called for any additional redirect or auth requests/responses. (Pull #1806)
• Strictly enforce that upload files must be opened in binary mode. (Pull #1736)
• Strictly enforce that client instances can only be opened and closed once, and cannot be re-opened. (Pull #1800)
• Drop mode argument from httpx.Proxy(..., mode=...). (Pull #1795)

Changelog

Sourced from httpx's changelog.

0.19.0 (19th August, 2021)

Added

• Add support for Client(allow_redirects=<bool>). (Pull #1790)
• Add automatic character set detection, when no charset is included in the response Content-Type header. (Pull #1791)

Changed

• Event hooks are now also called for any additional redirect or auth requests/responses. (Pull #1806)
• Strictly enforce that upload files must be opened in binary mode. (Pull #1736)
• Strictly enforce that client instances can only be opened and closed once, and cannot be re-opened. (Pull #1800)
• Drop mode argument from httpx.Proxy(..., mode=...). (Pull #1795)

0.18.2 (17th June, 2021)

Added

• Support for Python 3.10. (Pull #1687)
• Expose httpx.USE_CLIENT_DEFAULT, used as the default to auth and timeout parameters in request methods. (Pull #1634)
• Support HTTP/2 "prior knowledge", using httpx.Client(http1=False, http2=True). (Pull #1624)

Fixed

• Clean up some cases where warnings were being issued. (Pull #1687)
• Prefer Content-Length over Transfer-Encoding: chunked for content= cases. (Pull #1619)

0.18.1 (29th April, 2021)

Changed

• Update brotli support to use the brotlicffi package (Pull #1605)
• Ensure that Request(..., stream=...) does not auto-generate any headers on the request instance. (Pull #1607)

Fixed

• Pass through timeout=... in top-level httpx.stream() function. (Pull #1613)
• Map httpcore transport close exceptions to httpx exceptions. (Pull #1606)

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" documentation and the httpx.BaseTransport.handle_request() 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.

... (truncated)

Commits

• 0d7c4ca Version 0.19.0 (#1809)
• 2d9c358 Switch event hooks to also run on redirects. (#1806)
• 4986743 Resolve Python 3.6 tests hanging. (#1807)
• 927c88d Stricter enforcement of either 'with httpx.Client() as client' or 'client = h...
• 77193b2 Add a network pytest mark for tests that use the network (#1669)
• d514312 Use either brotli or brotlicffi. (#1618)
• acb5e6a Add charset_normalizer detection. (#1791)
• 7724661 Drop mode argument, 'httpx.Proxy(..., mode=...)' (#1795)
• 20e66d2 enforce-upload-files-binary-type (#1736)
• 50790af Update HTTP/2 support in extras_require (#1799)
• Additional commits viewable in compare view

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