Frozendict

Added typing for deepfreeze, register and unregister (see 99)

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.4.3...v2.4.4

* Now enums are not modified by deepfreeze (see 98)

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.4.2...v2.4.3

deepfreeze doesn't change anymore the original object, by kenodegard in https://github.com/Marco-Sulla/python-frozendict/pull/97

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.4.1...v2.4.2

What's Changed
* In deepfreeze, prefer registered conversions by eischaefer in https://github.com/Marco-Sulla/python-frozendict/pull/95
* Some little fixing to typing
* Documentation typo by lurch in https://github.com/Marco-Sulla/python-frozendict/pull/94

New Contributors
* eischaefer made their first contribution in https://github.com/Marco-Sulla/python-frozendict/pull/95

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.4.0...v2.4.1

Implemented deepfreeze, a function that let you transform any object, nested at any level, in a frozen one. Check the docs.

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.3.10...v2.4.0

What's Changed
* Fix pickling in python implementation by apmorton in https://github.com/Marco-Sulla/python-frozendict/pull/91
* fixed regression inintroduction of `FROZENDICT_PURE_PY` env var in conda builds

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.3.9...v2.3.10