Frozendict

* Fixed segfaults on Debian: https://github.com/Marco-Sulla/python-frozendict/issues/41
* Removed precompiled binaries due to bug https://github.com/Marco-Sulla/python-frozendict/issues/41
* Cleaned up the package removing a lot of unneeded CPython source files

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.1.2...v2.1.3

Added binaries for many platforms. Yet no binary for Windows.

* fixed a bug with `pickle` in MacOS
* `repr()` now is identical in pure py version and in C extension

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.1.0...v2.1.1

New features:
* Added posibility to compile on Windows (default is pure py version)
* Sum between frozendict and any other dict is now possible for all supported versions of Python, in C Extension and in pure py version, with the operand `|`
* Added type hinting support for C extension (Python 3.9+)
* Re-added (deprecated) FrozenOrderedDict

Bug fixes:
* Fixed equality bug on MacOs
* Fixed repr for subclasses

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.0.7...v2.1.0

Now frozendict C extension compiles also for Python 3.10

**Full Changelog**: https://github.com/Marco-Sulla/python-frozendict/compare/v2.0.4...v2.0.7

Now 'cls' can be a key in the pure py version