Frozendict

Fixed memory leaks in `repr()` and in costruction of an empty `frozendict`.

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.3.2...v2.3.3

Fixed a memory leak in `__hash__()` (thanks to gusostow for the report)

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.3.1...v2.3.2

* Added `key([index])`, `value([index])` and `item([index])` methods
* Other internal changes and clean-ups

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.3.0...v2.3.1

Added set, delete and setdefault methods.

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.2.1...v2.3.0

What's Changed
* Fix segfault on equals between a `frozendict` and any other dict-like object different but with the same length, in Python 3.6

New Contributors
* Bengt made their first contribution in https://github.com/Marco-Sulla/python-frozendict/pull/46

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.2.0...v2.2.1

C Extension:
* Added binaries for all supported Py versions (3.7+), OSes (Linux, Windows, MacOS) and architectures (x86_64)
* Speed is now fast as dict, if not faster!
* reversed() now works also for Py 3.6 and 3.7
* Completely refactored internal code, fixing a load of problems
* Fixed bug with empty instances of subclasses
* Removed binaries for Python 3.6, see next releases

Py version:
* now `frozendict` no more inherits from `MutableMapping`. We recommend anyway the C Extension.
* reversed supported

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.1.3...v2.2.0