6.0.0 (2022-01-22)

Features

- Use ``METH_FASTCALL`` where it makes sense.

``MultiDict.add()`` is 2.2 times faster now, ``CIMultiDict.add()`` is 1.5 times faster.

The same boost is applied to ``get*()``, ``setdefault()``, and ``pop*()`` methods. (:issue:`681`)

Bugfixes

- Fixed type annotations for keys of multidict mapping classes. (:issue:`644`)

- Support Multidict[int] for pure-python version.

``__class_getitem__`` is already provided by C Extension, making it work with the pure-extension too. (:issue:`678`)

Deprecations and Removals

- Dropped Python 3.6 support (:issue:`680`)

Misc

- :issue:`659`