v6.0.0

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. ((#681))

Bugfixes

• Fixed type annotations for keys of multidict mapping classes. ((#644))
• Support Multidict[int] for pure-python version.
  __class_getitem__ is already provided by C Extension, making it work with the pure-extension too. ((#678))

Deprecations and Removals

• Dropped Python 3.6 support ((#680))

Misc

• (#659)