treq 21.1.0

Features

• Support for Python 3.9: treq is now tested with CPython 3.9. (#305)
• The auth parameter now accepts arbitrary text and bytes for usernames and passwords. Text is encoded as UTF-8, per RFC 7617. Previously only ASCII was allowed. (#268)
• treq produces a more helpful exception when passed a tuple of the wrong size in the files parameter. (#299)

Bugfixes

• The params argument once more accepts non-ASCII bytes, fixing a regression first introduced in treq 20.4.1. (#303)
• treq request APIs no longer mutates a http_headers.Headers passed as the headers parameter when the auth parameter is also passed. (#314)
• The agent returned by treq.auth.add_auth() and treq.auth.add_basic_auth() is now marked to provide twisted.web.iweb.IAgent. (#312)
• treq's package metadata has been updated to require six >= 1.13, noting a dependency introduced in treq 20.9.0. (#295)

Improved Documentation

• The documentation of the params argument has been updated to more accurately describe its type-coercion behavior. (#281)
• The treq.auth module has been documented. (#313)

Deprecations and Removals

• Support for Python 2.7, which has reached end of support, is deprecated. This is the last release with support for Python 2.7. (#309)
• Support for Python 3.5, which has reached end of support, is deprecated. This is the last release with support for Python 3.5. (#306)
• Deprecate tolerance of non-string values when passing headers as a dict. They have historically been silently dropped, but will raise TypeError in the next treq release. Also deprecate passing headers other than dict, twisted.web.http_headers.Headers, or None. Historically falsy values like [] or () were accepted. (#294)
• treq request functions and methods like treq.get() and HTTPClient.post() now issue a DeprecationWarning when passed unknown keyword arguments, rather than ignoring them. Mixing the json argument with files or data is also deprecated. These warnings will change to a TypeError in the next treq release. (#297)
• The minimum supported Twisted version has increased to 18.7.0. Older versions are no longer tested in CI. (#307)