Simstring-fast

Fix saving
Fix building
Change tests to pytest

try and use ciwheels to build manylinux wheels

adds 3.12 support to build wheel

What's Changed
* remove the unused max and min feature size from the DBs by icfly2 in https://github.com/banking-circle-advanced-analytics/simstring-fast/pull/38
* Add diskcache by icfly2 in https://github.com/banking-circle-advanced-analytics/simstring-fast/pull/36
* Order irrelevance by icfly2 in https://github.com/banking-circle-advanced-analytics/simstring-fast/pull/39


**Full Changelog**: https://github.com/banking-circle-advanced-analytics/simstring-fast/compare/0.2.5...0.3.0