Python-lancelot

changes:
- use decision tree to index FLIRT patterns, rather than RegexSet, for much better performance

more ci juggling

removes:
- python bindings for py3.5

adds:
- python bindings for py3.9

doing the release dance, sorry.

fixes:
- version number

fixes:
- hopefully CI push of python packages

adds:
- pyflirt crate/python-flirt python package containing bindings to lancelot-flirt

changes:
- bumps some deps

also begins to add an emulator subsystem to lancelot core, though this is not complete, not working, nor considered part of the stable API yet.

changes:
- bumps some deps