Sfst

Changes
* Create wheels for python 3.10

Changes

Improve build system - upgrade CI for building wheels

Changes

* Fix the tar ball created by `sdist`

Changes
* Fix clang-format issues - AmbientLighter (74fcec5697239fc85d02a235d72db56135118b85)
* Add clang format github action - AmbientLighter (e61393d996c192d5bf68c6d51a1bc22586cecc2b)
* Fix memory leak when ranges are released - AmbientLighter (1db76c88f4ff3c00bd0f9f4d019b266f8cdbb903)
* Drop legacy SGI C++ extension from Python binding - AmbientLighter (2ec12bb2d558b9c5fda7bcd25a00c0800caf7424)

Changes

* Add support for default FST compiler without UTF8(8ffbb90ca5456906cc567684b4e380510a3431e4 by AmbientLighter)
* Fix compiler warnings(2722a3a3275dbf8543546d66f5e9dc1ade390a6b by santhoshtr and ec5ef225b0a46f8cc034d7a4522ef4ae36e38e4f by AmbientLighter )

Code modernization for multi-platform support. API improvements. Also Python binding.

Changes:

* Replaced the build system using CMake
* Removed the deprecated usage of hash_map and hash_set. They were replaced by unordered_map and unorderded_set as per latest C++ standards. This also made the tool compilable in major platforms like Ubuntu/Linux, Windows/VC++, Mac
* Cleaned up the code for consistent indentation
* Replaced usage of Char* in many places with std::string since it allows high level string manipulations without worrying on low level details
* Python binding for SFST and created CI pipelines to build source and binary distributions including python wheels for multiple python versions in multiple operating systems.
* Changed the fst interface methods so that analyse, generate methods can return an array of strings instead of requiring file pointers. This allows other programs to use SFST as library.